Skioptikonbild från Institutionen för fotografi vid Kungliga Tekniska ...
Skioptikonbild från Institutionen för fotografi vid Kungliga Tekniska Högskolan. Använd av professor Helmer Bäckström som föreläsningsmaterial. Bäckström var Sveriges första professor i fotografi vid Kungliga T... More
A drawing of a piece of cake and a piece of pie. Mathematics formula p...
A diagram of a pie with a pie and a tree / A drawing of a piece of cake and a piece of pie / Public domain stock illustration.
A person sitting at a desk with a blackboard. Learn girl school, educa...
A boy sitting at a desk looking at a blackboard with a blackboard on it / A person sitting at a desk with a blackboard / Public domain stock illustration.
A computer screen with a drawing of a circle and arrows. Mathematics f...
A blue and purple background with a triangle and a green light / A computer screen with a drawing of a circle and arrows / Public domain stock illustration.
A calculator sitting on top of a piece of paper. Mathematics calculato...
A calculator with a diagram and a calculator / A calculator sitting on top of a piece of paper / Public domain stock illustration.
A computer screen with a bunch of diagrams on it. Mathematics formula ...
A blue background with a diagram of a science / A computer screen with a bunch of diagrams on it / Public domain stock illustration.
A black, green, and gold logo with a half circle in the middle. Fibona...
The golden ratio logo - golden ratio logo / A black, green, and gold logo with a half circle in the middle / Public domain stock illustration.
A computer screen with a lot of numbers on it. Mathematics pay count, ...
A collection of numbers and symbols / A computer screen with a lot of numbers on it / Public domain stock illustration.
A calculator sitting on top of a wooden table. Calculator calculating ...
Close up of a calculator on a desk. A calculator with a calculator on a wooden table public domain stock photo.
A drawing of a clock with a yellow background. Mathematics formula phy...
A diagram of a complex system / A drawing of a clock with a yellow background / Public domain stock illustration.
A man standing in front of a blackboard with diagrams on it. Geometry ...
A man standing in front of a blackboard with drawings on it / A man standing in front of a blackboard with diagrams on it / Public domain stock illustration.
A person standing next to a calculator. Calculator mathematics task, e...
A person with a calculator / A person standing next to a calculator / Public domain stock illustration.
A sphere with a star in the background. Planet glass house cosmos.
The sphere in the space / A sphere with a star in the background / Public domain stock illustration.
A close up of a camera lens with numbers on it. Curta mechanical calcu...
The cuta - tec - c is a very large, compact, and compact camera / The machine is made of black plastic and has a metal handle / Public domain vintage photo.
A close up of a camera lens on a white background. Curta mechanical ca...
The black dials are made from a black metal / The bottom of the black metal cylinder has a circular dial / Public domain vintage photo.
A close up of a colorful abacuse on a table. Number count decade, educ...
Visual patterns: A close up of a colorful abacus / A close up of a colorful calculator - public domain stock photo.
A computer screen with a lot of numbers on it. Mathematics formula phy...
A blue sky with clouds and a number of numbers / A computer screen with a lot of numbers on it / Public domain stock illustration.
A person standing next to an abacuse. Calculator count how to calculat...
A person with a calculator / A person standing next to an abacuse / Public domain stock illustration.
A close up of a camera lens on a table. Curta mechanical calculator, w...
The dials are made of metal and the dials are made of metal / The dials are made of metal and are made of metal / Public domain vintage photo.
A drawing of a plane with a blue background. Mathematics formula physi...
A blue background with a set of circles and diagrams / A drawing of a plane with a blue background / Public domain stock illustration.
A blackboard with a drawing of a hexagram on it. Mathematics physics f...
A blackboard with a blackboard with a white chalk circle and a blackboard with a white chalk circle and a blackboard with a white chalk circle and a blackboard with a white chalk / A blackboard with a drawing o... More
A diagram of a sphere with a cross section. Mathematics formula physic...
The diagram of the sphere / A diagram of a sphere with a cross section / Public domain stock illustration.
A computer screen with a lot of numbers on it. Mathematics formula phy...
A blue background with numbers and numbers / A computer screen with a lot of numbers on it / Public domain stock illustration.
A computer screen with a bunch of diagrams on it. Mathematics formula ...
A graphic of a complex diagram with a circle and a circle / A computer screen with a bunch of diagrams on it / Public domain stock illustration.
A diagram of a circle and a circle area. Mathematics formula physics, ...
A blue background with a circle and a circle / A diagram of a circle and a circle area / Public domain stock illustration.
A sphere with a star in the middle of it. Cosmos ball globe.
The world in a sphere / A sphere with a star in the middle of it / Public domain stock illustration.
A person sitting at a desk with a blackboard. Learn girl school, educa...
A boy sitting at a desk looking at a computer screen with a blackboard and a question marks on it / A person sitting at a desk with a blackboard / Public domain stock illustration.
A close up of a camera on a white surface. Curta mechanical calculator...
The cursor is a compact machine that can be used as a coffee machine / The cura machine is a compact machine that can be used for photography and photography / Public domain vintage photo.
A triangle is shown with a blue line on it. Geometry euclid the sum se...
A triangle with a triangle in the middle and a circle in the middle / A triangle is shown with a blue line on it / Public domain stock illustration.
A calculator sitting on top of a white table. Calculator count how to ...
A calculator sitting on top of a table / A silver calculator sitting on top of a white surface / Work-related public domain stock photo.
A person carrying a large keyboard on a white background. Calculation ...
A person walking with a calculator / A person carrying a large keyboard on a white background / Public domain stock illustration.
A globe with a network over it and a star in the background. Grid ball...
The earth is a sphere with a grid design on it / A globe with a network over it and a star in the background / Public domain stock illustration.
A close up view of a camera lens. Curta mechanical calculator, work.
The dials are made of stainless steel / The dials are made of metal and are made of metal / Public domain vintage photo.
A group of people standing next to each other. Personal silhouettes ma...
Group of people. Free images of people. Use free photos of people without any copyright restrictions.
A blue background with a drawing of a cube. Mathematics physics formul...
A graphic of a cube with a blue background and a grid of circles and a square with a grid of squares / A blue background with a drawing of a cube / Public domain stock illustration.
A calculator sitting in front of a chalkboard. Mathematics calculator ...
A calculator on a chalkboard / A calculator sitting in front of a chalkboard / Public domain stock illustration.
A blue background with a drawing of a diagram. Geometry mathematics cu...
A blue background with a diagram of a complex complex structure / A blue background with a drawing of a diagram / Public domain stock illustration.
A computer generated image of a man's face. Mathematics calculation pa...
Stock photo: A computer generated image of a globe / A computer generated image of a man's face.
A computer generated image of a man's head. Geometry mathematics cube,...
A graphic of a complex structure with symbols and diagrams / A computer generated image of a man's head / Public domain stock illustration.
A blackboard with a chalk board and numbers on it. Mathematics physics...
A blackboard with numbers on it / A blackboard with a chalk board and numbers on it / Public domain stock illustration.
A computer screen with an image of a sphere. Abstract general educatio...
A sphere with a sphere and a circle with a graph on it / A computer screen with an image of a sphere / Public domain stock illustration.
An image of a diagram of a plane. Mathematics formula physics, science...
A diagram of the model of the model / An image of a diagram of a plane / Public domain stock illustration.
The earth is surrounded by a network of stars. Grid ball globe earth.
The earth is surrounded by a grid of interconnected lines / The earth is surrounded by a network of stars / Public domain stock illustration.
A sphere shaped object with a star in the background. Planet glass hou...
The sphere is a sphere that is shaped like a sphere / A sphere shaped object with a star in the background / Public domain stock illustration.
A blackboard with a chalk drawing of a pi symbol. Pi board school, edu...
A blackboard with a number pi on it / A blackboard with a chalk drawing of a pi symbol / Public domain stock illustration.
A blackboard with a drawing of a circle on it. Pi board school, educat...
A blackboard with a circle with numbers and equations / A blackboard with a drawing of a circle on it / Public domain stock illustration.
A picture of a clock with a fibonacci number on it. Fibonacci geometry...
A spiral design with numbers and numbers on it / A picture of a clock with a fibonacci number on it / Public domain stock illustration.
A black and white photo of a bunch of diagrams. Geometry mathematics c...
A diagram of a circle with a circle and a circle with a point at the center / A black and white photo of a bunch of diagrams / Public domain stock illustration.
A black and white drawing of a square and a rectangle. Geometry mathem...
A black and white image of a number line with a number line and a number line / A black and white drawing of a square and a rectangle / Public domain stock illustration.
A computer screen with a spiral of numbers. Mathematics formula physic...
A blue background with a circle of binary numbers and a blue background / A computer screen with a spiral of numbers / Public domain stock illustration.
A computer screen with a lot of diagrams on it. Geometry mathematics c...
A blue background with a circle and a number of arrows / A computer screen with a lot of diagrams on it / Public domain stock illustration.
A bunch of green boxes stacked on top of each other. Fractal mathemati...
The green cubes of the cubes / A bunch of green boxes stacked on top of each other / Public domain stock illustration.
A computer screen with an image of a sphere. Mathematics calculation p...
A diagram of a sphere with a sphere and a sphere / A computer screen with an image of a sphere / Public domain stock illustration.
A calculator sitting on top of a yellow table. Calculator calculation ...
A calculator with a number of buttons on it. A calculator with numbers on it public domain stock photo.
A sphere with a star in the background. Glass house cosmos ball.
The world in the sky / A sphere with a star in the background / Public domain stock illustration.
A close up of a camera lens on a white surface. Curta mechanical calcu...
The compass is a circular, circular, and has a black handle / The dials are made of steel and are made of steel / Public domain vintage photo.
A close up of a camera lens on a white surface. Curta mechanical calcu...
The lens has a small amount of time and space to adjust the lens / The lens is now fully assembled / Public domain space exploration photo.
A green globe with a grid of lines around it. Grid ball globe earth.
A globe with a grid of green lines / A green globe with a grid of lines around it / Public domain stock illustration.
A diagram of the shape of a pyramid. Mathematics formula physics, scie...
A diagram of the different angles of / A diagram of the shape of a pyramid / Public domain stock illustration.
A drawing of a set of objects on a blue background. Mathematics formul...
A graphic of a diagram with a circle and a circle / A drawing of a set of objects on a blue background / Public domain stock illustration.
A calculator with a pirate figurine next to it. Calculator tax reform ...
A calculator with a pirate figurine next to it
A computer screen with a bunch of diagrams on it. Banner header mathem...
A blue background with a number of symbols and a diagram / A computer screen with a bunch of diagrams on it / Public domain stock illustration.
A black and white photo of a diagram of a machine. Mathematics formula...
A graphic of a complex structure with a geometric figure of a cube, a cube, and a pyramid / A black and white photo of a diagram of a machine / Public domain stock illustration.
A black and white drawing of a tower. Geometry mathematics cube, educa...
A diagram of the complex structure of a cube / A black and white drawing of a tower / Public domain stock illustration.
A sphere with a star in the background. Glass house cosmos ball.
The world in the night sky / A sphere with a star in the background / Public domain stock illustration.
A green sphere with lines and dots on it. Grid ball globe earth.
A green globe with a grid of lights / A green sphere with lines and dots on it / Public domain stock illustration.
A green globe with a grid of lines around it. Grid ball globe earth.
The earth in the space / A green globe with a grid of lines around it / Public domain stock illustration.
A computer generated image of a planet and a star. Grid ball globe ear...
The earth is surrounded by a grid of connected lines / A computer generated image of a planet and a star / Public domain stock illustration.
A close up of a camera on a white surface. Curta mechanical calculator...
- - the music machine / The metal is a very simple design / Public domain vintage photo.
A man's head is shown with a brain model in front of it. Skull and cro...
A human skull with a brain inside it / A man's head is shown with a brain model in front of it / Public domain stock illustration.
A drawing of a circle with a red background. Mathematics physics formu...
The circle of the circle / A drawing of a circle with a red background / Public domain stock illustration.
A blue background with a drawing of a computer keyboard. Mathematics p...
Mathematical formulas on a blue background / A blue background with a drawing of a computer keyboard / Public domain stock illustration.
A computer generated image of a purple flower. Fractal mathematics com...
Purple abstract wallpapers unique purple abstract wallpapers wallpaper cave this week of purple abstract wallpapers beautiful purple abstract wallpapers wallpaper cave this week / A computer generated image of ... More
A blue background with a lot of writing on it. Mathematics formula phy...
A blue background with many formulas written in white / A blue background with a lot of writing on it / Public domain stock illustration.
A blackboard with a drawing of a graph on it. Mathematics formula phys...
A blackboard with a diagram of a graph and circles / A blackboard with a drawing of a graph on it / Public domain stock illustration.
A pair of red balls with diagrams on them. Geometry mathematics cube, ...
The red sphere with the names of the planets / A pair of red balls with diagrams on them / Public domain stock illustration.
A computer screen showing a computer screen with a blue wave pattern. ...
A diagram of the structure of a blue structure with a number of arrows and a number of arrows / A computer screen showing a computer screen with a blue wave pattern / Public domain stock illustration.
A drawing of a circle with a line going through it. Mathematics calcul...
A diagram of a sphere / A drawing of a circle with a line going through it / Public domain stock illustration.
A blackboard with a drawing of a compass on it. Mathematics physics fo...
A blackboard with a compass and a compass / A blackboard with a drawing of a compass on it / Public domain stock illustration.
A white wall with a lot of writing on it. Pay count mathematics, educa...
Visual patterns: A wall with numbers written on it / A wall covered in red marker writing - public domain stock photo.
A man with a calculator in front of him. Calculator man face.
A man is sitting on a keyboard with a number pad / A man with a calculator in front of him / Public domain stock illustration.
A picture of the earth surrounded by lines. Earth globe light.
The world is in the hands of the gods / A picture of the earth surrounded by lines / Public domain stock illustration.
A calculator sitting on top of a wooden table. Numbers calculator fina...
A calculator with a calculator on it / A calculator with a number of calculators on it / Work-related public domain stock photo.
A green and yellow globe surrounded by stars. Grid ball globe earth.
The earth is a sphere with a grid of yellow dots / A green and yellow globe surrounded by stars / Public domain stock illustration.
A drawing of a diagram of a plane. Mathematics calculation pay, educat...
A handwritten sheet of paper with a mathematical formula and a grid of numbers / A drawing of a diagram of a plane / Public domain stock illustration.