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CHECK YOURSELF ANSWERS
13.0Ã108656Ã10â9=2.0Ã108Î»âÎ»=437Â nm.
2a1.0 s
b
3
4For red light because red has larger wavelength.
5The third order maximum is expected at an angle given by sinÎ¸=3Î»d or approximately Î¸â3Î»d since angles are small. The first minimum of the single slit pattern is at Î¸âÎ»b=Î»(d3)=3Î»d, i.e. at the same angle and so the intensity there is zero.
6From d sin Î¸ = nÎ» we find n Ã 400 = m Ã 500. The smallest integers satisfying this equation are n = 5, m = 4.
