Question: There are 5620 lines per centimeter in a grating that is used with light whose wavelength is 471 nm. A flat observation screen is located at a distance of 0.750 m from the grating. What is the minimum width that the screen must have so the centers of all the principal maxima formed on either side of the central maximum fall on the screen?
Book Answer: 1.95 m
I am having a lot of difficulty comprehending the last part of the question. I usually have an approach to a problem though, but for this one...I feel like it's impossible to have one without seeing how to do this problem!
2007-04-22 07:53:24 · 1 answers · asked by Jimmy 3 in Science & Mathematics ➔ Physics
It seems like something's missing from the question, which is how wide the grating is. If you had a grating that was 1 meter wide, the screen would have to be wider than if you had a grating that was only 1 cm wide, because you'd have more principal maxima.
2007-04-22 08:17:04 · answer #1 · answered by Isaac Laquedem 4 · 0⤊ 0⤋