1. What is the speed of light in a vacuum?
A. c=3 x 10^8 m/s
2. The wavelengths of visible light vary from about 300 nm to 700 nm. What is the range of frequencies of visible light in a vacuum?
C. 4.29⋅10¹⁴ Hz to 1⋅10¹⁵ Hz
3. An object absorbs red, orange, yellow, blue, indigo, and violet light. What color is it?
C. green
4. Why is a polarized filter helpful to a photographer?
B. It blocks some light but not all.
5. What effect do clouds have on the color of the sky?
A. They reflect light waves.
I took the quick check, here are the anwsers :)
1 answer
Great job! Your answers are correct.