Complete Question
A grating has 767 lines per centimetre.Find the angles of the first three principal maxima above the central fringe when this grating is illuminated with 672 nm light.
Answer:
The first is
The second is
The third is
Explanation:
From the question we are told that
The number of lines per cm is
The wavelength is
Generally the condition for constructive interference is
Here d is the distance of separation of the slit which is mathematically represented as
So
For the first angle n = 1
So
For the second angle n = 2
So
For the second angle n = 3
So
If the distance between you and the source is increasing, then
you'll hear a sound with a lower pitch than the sound the source
is actually making. Either you're moving away from the source,
or the source is moving away from you.
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Answer:
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