Primary Colors of Light and Retina Cones Quiz

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Questions and Answers

If a 60-W incandescent bulb emits 90% thermal energy, how much thermal energy is emitted by the bulb each second?

20 W
50 W
45 W (correct)
40 W

What percentage of the energy emitted by an incandescent bulb is thermal energy?

90% (correct)
60%
80%
70%

Which type of light has a magnetic field that vibrates in only one direction?

Electric light
Unpolarized light
Transverse light
Linearly polarized light (correct)

What are the primary colors of light?

Red, green, and blue (D) Signup and view all the answers

If you mixed equal amounts of red, green, and blue paint, what would be the result?

White paint (C) Signup and view all the answers

What are pigments used for?

To change the color of other substances (A) Signup and view all the answers

How can light be polarized using a filter?

By using a filter with parallel slits that only allows light waves with magnetic fields vibrating in the same direction to pass through (A) Signup and view all the answers

What happens when multiple polarizing filters are used?

The amount of light transmitted depends on the orientation of the filters (B) Signup and view all the answers

What is the purpose of polarizing sunglasses?

To block horizontally polarized light to reduce glare from reflected surfaces (C) Signup and view all the answers

In what way does the orientation of polarizing filters affect the transmission of light?

When positioned at right angles, the light is blocked; when positioned in the same direction, the light can pass through (D) Signup and view all the answers