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pickupchik [31]
4 years ago
10

What is most likely the color of the light whose second-order bright band forms an angle of 13.5° if the diffraction grating has

175 lines per mm?
Physics
2 answers:
ipn [44]4 years ago
5 0

Answer : The color of light is red.

Explanation :

Given that,

Numbers of lines in a diffraction grating, n = 175 lines per mm

The grating equation for the bright band is given by :

d sinФ = n λ

Where,

d is the distance between the slits

Ф is the angle to maxima

n is the order, n = 2

λ is the wavelength of the light.

Since, d = 1/N

N is the numbers of lines

So, \dfrac{1}{N}sin\phi=n\lambda

\lambda=\dfrac{sin\phi}{Nn}

converting mm to m

\lambda=\dfrac{sin (13.5)}{175000\ m\times 2}  

λ = 6.66 × 10⁻⁷ m

or

λ = 667 nm

This shows the wavelength of red light. So, the color of light emitted will be red.

Hence, this is the required solution.

Sophie [7]4 years ago
3 0
The answer is red, just has that question
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