Respuesta :
Answer:
What is the wavelength in nm of a light whose first order bright band forms a diffraction angle of 19.0°, and the diffraction grating has 600.0 lines per mm?
543 nm
Explanation:
The wavelength in nm of a light whose first order bright band forms a diffraction angle of 19.0° is 543 nm.
What is wavelength?
The wavelength is the distance between the adjacent crest or trough of the sinusoidal wave.
Using Huygen's principle of light, we have an expression
nλ =d sinθ
where, n is the order of maximum
λ is the wavelength of light
d is the distance between the lines on diffraction grating
θ is the angle.
The distance between the lines on diffraction grating is
d = 1 / (600 x 1000) or 0.00000167 m
For first order bright band, n = 1
Then, the wavelength will be
1 x λ = 0.00000167 x sin19.0°,
λ = 0.000000543 m
λ = 543 nm
Thus, the wavelength of the first order bright band is 543 nm .
Learn more about wavelength.
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