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Why do cats have vertical pupils?

to have sharper vision

to better see in the dark

to be more attractive

it is a useless mutation

The sharpest image is produced by round pupils, and if cats weren’t nocturnal, they probably would have round pupils like us. But the vertical pupil, in combination with horizontal eyelids, gives the cat greater and more accurate control in different types of lighting. A cat may adjust the amount of light by moving eyelids only.

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Who should you expect to show stronger red-eye effect?

blue-eyed people

brown-eyed people

there is no difference

Why were photographic prints sepia toned?

sepia process was cheaper than black and white

for improved resistance

it is simply ageing of paper

it is the effect of exposition to sunlight

World's fastest high-speed cameras were built to take photos of specific objects. What kind of objects?

rocket launches

nuclear bomb explosions

Which part of a dog's or a cat's eye reflects the light?

a layer behind retina