Find the largest wavelength of light falling on double slits separated by 1.20 mu m for which there is a first-order maximum. Is this in the visible part of the spectrum?

Lillie Pittman 2022-07-18 Answered
Find the largest wavelength of light falling on double slits separated by 1.20   μ   m for which there is a first-order maximum. Is this in the visible part of the spectrum?
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Answers (1)

ab8s1k28q
Answered 2022-07-19 Author has 17 answers
Given:
Slit width, d = 1.2 micrometer = 1.2 × 10 6 m
order, m = 1
Formula used:
For the bright fringe, we use the formula
d sin θ = m λ
where, m is the number of order, d is the slit width, λ is the wavelength and angle is the angular width.
For maximum value, the value of sin θ = 1
So
λ = 1.2 × 10 6   m
This value of wavelength does not lie in the visible range. The visible range is from 400 nm to 700 nm.
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