Physics, asked by pavanganesh8076, 1 year ago

Find the distance on focal plane where parallel and paraxial rays meet after reflection

Answers

Answered by koyalsarkar
0

Answer:

this is ur answer

Explanation:

Large spherical mirror from figure (b) we can be that in care of large spherical mirror the mirror does not have a well defined focal point this is called spherical observed and results in a blurned image of an extended object.

From figure (c) we can see that a spherical mirror that is small compared to is radius of curvature the mirror approximation of parabolic mirror.

So rays that arrive parallel to the optical axis are reflection to a well defined focal point so we can say for paraxial rays spherical mirror has are defined focus well

Hence in figure we can see that a signal rays is reflected by a spherical concave mirror.the incident ray is parallel to optical axis .For paraxial rays all rays will meet at the focus.

R=CF+FP

and angle of incidence =angle of reflection

sinθ≃θ (small angle approximates)

FX≃FP or CF≃FP

R=CF+FP

FP+FP

2FP

2×F

f=

2

R

(in the small angles approximation for paraxial approximation ) focal length of a mirror is half times its Radius. hope it helps

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