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2 years ago

12

Blue light, which has a wavelength of about 475 nm, is made to pass through a slit of a diffraction grating that has 425 lines p

er mm and forms a first-order bright band. What is the angle of diffraction? Round answer to the nearest whole number.

2 answers:

tatiyna2 years ago

8 0

The formula relating the variables involved is:

distance between lines * sin(angle of diffraction) = order of band * wavelength

dsin(∅) = nλ

The line spacing may be calculated using the fact that there are 425 lines per mm and 1 mm contains 0.001 m

d = 0.001 / 425 = 2.35 x 10⁻⁶ m
λ = 475 x 10⁻⁹ m

Substituting the values,

2.35 x 10⁻⁶ * sin(∅) = 1 * 475 x 10⁻⁹
∅ = 11.7°

The angle of the first order bright band, or maxima, is 11.7°

andreyandreev [35.5K]2 years ago

4 0

round your answer to 12

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