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White light strikes (a) a diffraction grating and (6) a
Chapter 27, Problem 20Q(choose chapter or problem)
Problem 20Q
White light strikes (a) a diffraction grating and (6) a prism. A rainbow appears on a wall just below the direction of the horizontal incident beam in each case What is the color of the top of the rainbow in each case? Explain.
Questions & Answers
QUESTION:
Problem 20Q
White light strikes (a) a diffraction grating and (6) a prism. A rainbow appears on a wall just below the direction of the horizontal incident beam in each case What is the color of the top of the rainbow in each case? Explain.
ANSWER:
Step-by-step solution
Step 1 of 2
According to the fringe width formula above. The amount of spreading of light deepens on the wavelength. The longest wavelength red spread out the most, the shortest wavelength violet is the least. So the color on top, belove the central line, is the color which spread the least. That is violet. As in the figure