Why do cats’ eyes glow in the dark?

They behave a layer called the tapetum lucidum

If you stare at the sun through a telescope without protection, what happens?

Your eye absorbs so much energy it can burn

What is the Purkinje effect?

The shift in color sensitivity in low light

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Optics and Vision Pre-requisite Knowledge Quiz

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Questions 15

Answers

1
Which part of the eye provides the most focusing power?
Lens
Optic Nerve
Cornea
Retina
2
What happens to your pupils in total darkness?
They reflect infrared light
They constrict
They stop moving completely
They dilate
3
Why does a straw appear bent in water?
Refraction
The water molecule push the light away
Polarization
Reflection
4
Which of the following is NOT a type of optical aberration?
Spherical Aberration
Chromatic Aborration
Quantum Aberration
Astigmatic Aberration
5
Which of these can humans NOT see?
All of the above
Radiowaves
Infrared
Ultraviolet
6
What happens if you increase the refractive index of a medium?
Light speeds up
Light slows down
The laws of physics break
Light disappears
7
Why do cats’ eyes glow in the dark?
They behave a layer called the tapetum lucidum
They emit light naturally
Magic. No one scientifically can explain it.
Their pupils are larger
8
Which light has the highest energy per photon?
Blue
Red
Violet
Green
9
If you close one eye and look in a mirror, how many eyes do you see?
April Fools! It depends on perspective
Zero
One
Two
10
What is the speed of light in a vacuum?
∞ (Because light is massless),
186,000 mph
299,792,458 m/s
3.0 × 10⁸ m/s,
11
If you stare at the sun through a telescope without protection, what happens?
The telescope melts first
Nothing
You instantly go blind
Your eye absorbs so much energy it can burn
12
The human eye can detect a single photon under ideal conditions.
True
False
13
What is the Purkinje effect?
The ability to see into the ultraviolet spectrum
The shift in color sensitivity in low light
A ghostly optical illusion
The effect of blinking rapidly while looking at lights
14
If you wear 3D glasses backward…
You get x-ray vision
Your eyes switch dominance
The image stays the same
You see 3D in reverse
15
A myopic (nearsighted) person can see clearly…
Only far objects
Only near objects
Everything
Only in absolute darkness

Optics and Vision Pre-requisite Knowledge Quiz Flashcards | StudBud