一題普物,光學那部分的相關問題???

A laser beam of wavelength 波長=632.8nm shines at normal incidence on the reflective side of a compact disc.The tracks of tiny pits in which information is coded onto the CD are 1.60 微米 apart.For what angles of reflection will the intensity of light be maximum?
The formula for diffraction grating is:d sinΘ = m λd = distance between slits or pits.Θ = anglem = order of linesλ = wavelengthFor m =1 and m = 2 (first and second order lines)

d = 1.6 x 10E-6 m

λ = 632.8 x 10E-9 m

We get the maximum angles are 23.3 degrees and 52.3 degrees. 參考資料 我
答案是 arcsin(632.8*n / 1600)

n = 0、1、2、...... 嗎?
to 小昱我沒有答案ㄟ..。

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