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Optics Test
A test by
Oren Lahav
.
Test Questions
Question
My lens converges light. What does that mean?
Answers
Correct
Answer Text
It focuses it by bringin rays closer together
It makes it disperse into pretty colours
It focuses it by moving rays further apart
Question
What causes dispersion- light separating into a multitude of colours?
Answers
Correct
Answer Text
Different colours traveling at different speeds
The colours want to escape so they move apart whenever they can
Different wavelengths reflecting at different angles
Question
If red has a frequency of 4.5 * 10 ^ 14 Hz, what's its wavelength?
Answers
Correct
Answer Text
23
6.7 * 10 ^ - 7
4.5 * 10 ^ -14
Question
A light ray travels in a medium at an incidence angle of 30, when it hits a mirror and is reflected. What will be the reflection angle?
Answers
Correct
Answer Text
30
60
Depends on the index of reflection
Question
What kind of wave is light?
Answers
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Answer Text
Electromagnetic wave
Particle wave
Longitudenal wave
Question
With diffraction, how big should the slit be so that diffraction will be significant?
Answers
Correct
Answer Text
It makes no difference
As small as 10 ^ -7, proportional to the wavelength
As big as 10 ^ 12, proportional to the frequency
Question
Using Snell's law, if a ray travels through medium 1 with n1=1 and an angle of 45 degrees, and then moves into medium 2 with an angle of 60, what will n2, the index of refraction for the second medium, be?
Answers
Correct
Answer Text
0.89
3.45
1.22
Question
How do sunglasses work?
Answers
Correct
Answer Text
They reflect some light and transmit some
They disperse light
They contain polarizing filters
Answer
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Published In…
Physics
