Homework 3 - Due Thursday, March 2

COLOR--The electromagnetic spectrum above can be used to help answer the following questions.

1. If a patch of cloth only reflects back all wavelengths greater than 670 nm, what color will we perceive when the cloth is shown under a spotlight of normal white light & why?

If that same patch of cloth is shown under a spotlight that contains the following wavelengths (560, 610, and 680), what color will we perceive and why?

If that same patch of cloth is shown under a spotlight that contains the following wavelengths (480, 520, and 630), what color will we perceive and why?

2. A spotlight of 420 nm is shone onto the same white surface as a spotlight of 680 nm. What color of light will we perceive shining on that white surface and why?

3. A beam of light made up of 400, 550 and 650 nm wavelengths passes through a light filter that shows all wavelengths between 450 and 600 nm. What color light will be perceived and why?

If that same filtered light (coming out of the filter) then contacts a patch of paint that reflects wavelengths between 400-500 nm and 600-700 nm, what color will be perceived and why?