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The Science of Photography

Photography

A scientific examination of optical physics, chemical reactions, and sensor technology in photography.

optics physics sensitometry

8 Questions Medium Ages 5+ Nov 9, 2026

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About this Study Set

This study set covers Photography through 8 practice questions. A scientific examination of optical physics, chemical reactions, and sensor technology in photography. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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1 What physical relation defines the f-number (f-stop) of a camera lens?

A Focal length divided by the diameter of the entrance pupil
B Diameter of the entrance pupil multiplied by the focal length
C Sensor diagonal length divided by the shutter speed duration
D ISO speed sensitivity multiplied by the focal length

2 Why does a standard Bayer filter array on digital image sensors contain twice as many green filter elements as red or blue ones?

A Green light photons carry twice as much kinetic energy as red or blue photons
B Silicon sensors cannot detect green light without double filtration
C Human visual perception is most sensitive to green wavelengths for luminance
D Infrared radiation naturally degrades red and blue sensors twice as fast

3 In film photography, what chemical transformation occurs when light strikes silver halide crystals in the emulsion?

A Silver ions are oxidized into silver oxide crystals
B Silver ions are reduced to specks of metallic silver
C Gelatin breaks down into organic acids
D Bromide ions convert directly into elemental oxygen gas

4 Which optical phenomenon causes image sharpness to decrease due to wave interference when a lens aperture is closed down to very small openings like f/22?

A Spherical aberration
B Focus shift
C Diffraction
D Barrel distortion

5 The Bunsen-Roscoe law states that exposure equals light intensity multiplied by exposure time. What is the deviation from this rule during extremely long or short exposures called?

A The Purkinje effect
B The Schwarzschild effect
C The Doppler shift
D The Talbot effect

6 Which optical property causes chromatic aberration in camera lenses?

A Dispersion, causing different wavelengths of light to refract at different angles
B Polarization, causing light waves to align in a single plane
C Diffraction, causing light waves to bend around the edges of the diaphragm
D Total internal reflection, causing light to bounce inside the rear lens element

7 Which physical effect enables digital image sensors (CMOS and CCD) to convert photons into electrical charges?

A Thermoelectric effect
B Internal photoelectric effect
C Piezoelectric effect
D Photomechanical effect

8 What optical term describes the closest focus distance at which the depth of field extends from half that distance all the way to infinity?

A Conjugate distance
B Nodal distance
C Hyperfocal distance
D Focal plane limit

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