Show that angle of deviation depends on angle of incidence
Answers
Answered by
6
Consider the ray ABCD.
The angle of incidence is i and angle of deviation is D.
We know that we can reverse the light ray hence consider a ray DCBA.
The angle of incidence is e and the angle of deviation is d.
When a straight line intersect at two points, the opposite angles are equal.
Therefore we will have two angles of incidence for the same angle of deviation that is i and e.
The angle of the prism A equals :
A = i + e - d
In terms of d :
d = i + e - A
We can plot the angle of deviation against the angle of incidence.
From the graph we observe that as i increases, the angle of deviation d decreases until it attains a minimum value then it starts increasing for further increase in angle if incidence.
The angle of incidence is i and angle of deviation is D.
We know that we can reverse the light ray hence consider a ray DCBA.
The angle of incidence is e and the angle of deviation is d.
When a straight line intersect at two points, the opposite angles are equal.
Therefore we will have two angles of incidence for the same angle of deviation that is i and e.
The angle of the prism A equals :
A = i + e - d
In terms of d :
d = i + e - A
We can plot the angle of deviation against the angle of incidence.
From the graph we observe that as i increases, the angle of deviation d decreases until it attains a minimum value then it starts increasing for further increase in angle if incidence.
Similar questions