Prism Flashcards
1
Q
Deviation by prism
A
delta + A = i + e
2
Q
Maximum value for n?
A
= [1 + (cotA/2)^2]
3
Q
Angle of prism =?
A
r + r’
4
Q
Grazing incidence =?
A
i = 90
5
Q
Grazing emergence =?
A
e = 90
6
Q
For minimum deviation
A
i = e r = r'
n = [sin(A + delta)/2] / sin(A/2)
7
Q
Why does dispersion occur?
A
It occurs due to different refractive index for different wavelengths
8
Q
Angular dispersion =?
A
Theta = (nv - nr)A
9
Q
Dispersive power
A
w = (nv -nr)/(n-1)
10
Q
For dispersion without deviation
A
A(n - 1) = -A’(n’ -1)
11
Q
Deviation without dispersion
A
A(nv -nr) = -A’(nv’ -nr’)
