10 Questions
If a 60-W incandescent bulb emits 90% thermal energy, how much thermal energy is emitted by the bulb each second?
45 W
What percentage of the energy emitted by an incandescent bulb is thermal energy?
90%
Which type of light has a magnetic field that vibrates in only one direction?
Linearly polarized light
What are the primary colors of light?
Red, green, and blue
If you mixed equal amounts of red, green, and blue paint, what would be the result?
White paint
What are pigments used for?
To change the color of other substances
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
What happens when multiple polarizing filters are used?
The amount of light transmitted depends on the orientation of the filters
What is the purpose of polarizing sunglasses?
To block horizontally polarized light to reduce glare from reflected surfaces
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
Test your knowledge about the primary colors of light and the three different types of cones in the retina of the eye. Learn how mixing these primary colors in different proportions produces all the colors that we see. This quiz also includes a vocabulary section related to pigments and paint.
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