question edit history translations

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.

globalquiz.org

7

catseyesnatureopticsphotographyphysicszoology

Eyes quiz Optics quiz Photography quiz

You will play as

Answers by country

Canada

16%

78%

0%

3%

98

Australia

15%

77%

0%

3%

103

Spain

10%

77%

3%

4%

89

Italy

13%

77%

0%

5%

75

the Netherlands

16%

76%

3%

1%

55

Switzerland

19%

75%

0%

1%

117

Poland

18%

74%

1%

3%

25979

Germany

19%

74%

0%

3%

1054

Ukraine

18%

74%

0%

1%

133

Pakistan

19%

72%

2%

2%

77

Unknown

20%

70%

0%

4%

48

Belarus

16%

69%

4%

7%

65

the United States

21%

68%

1%

5%

1190

Russia

19%

68%

0%

7%

294

Austria

25%

68%

1%

2%

183

the United Kingdom

21%

66%

1%

7%

444

India

25%

63%

2%

2%

921

Uruguay

29%

62%

3%

1%

54

Kazakhstan

24%

59%

3%

11%

54

the Philippines

35%

54%

5%

3%

91

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