7. The wavelength of a laser beam used in a compact disc player is 790 nm....

Question

Question

$7. The wavelength of a laser beam used in a compact disc player is 790 nm. Suppose that a diffraction grating produces first-$

science physics

Answer 1

Answer #1

d = slit width = 1.2 mm = 1.2 x 10^-3 m

$\lambda$ = wavelength of laser beam = 790 x 10^-9 m

D = distance = 3 mm = 0.003 m

w = spacing between the slits

Spacing between the slits is given as

w = D $\lambda$ /d

w = (0.003) (790 x 10^-9)/(1.2 x 10^-3)

w = 2 x 10^-6 m

Answer 2

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