What is the highest order spectrum which may be obtained with a light of
wavelength 650 nm by means of plane transmission grating having 5000 lines
per cm
Answers
Answered by
0
Answer:
The highest order is
=
3
Explanation:
The highest order is
=
3
Explanation:
The equation for the diffraction is
n
λ
=
d
sin
θ
The wavelength of the light is
λ
=
600
⋅
10
−
9
m
The width of a line is
d
=
1
5000
⋅
100
m
The maximum value for
sin
θ
=
1
Therefore,
n
=
d
sin
θ
λ
=
0.2
⋅
10
−
5
6
⋅
10
−
7
=
0.033
⋅
10
2
=
3.33
≃
3
The highest order is
=
3
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