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Please answer !!
Q- A Ray of light strikes a plane mirror such that it's angle of incidence is 30°. What angle does the reflected Ray make with mirror surface ??
Q- A dentist's mirror has a radius of curvature of 3cm. How far must it be placed from a small dental cavity to give a virtual image of the cavity that is magnified five times ??
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Answers
Answered by
4
heya mate,here is your solution of the question.
Answer no.1 :
it will be 90°-30°=60°
as 90° is the position of the normal and 30° is the angle of incidence.
Answer no.2
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Answered by
6
Hi mate here is ur query...
========================
1.) reflection angle=incident angle
reflection angle=30°
hence it will make (90-30=60°) with mirror ..
2.)h2/h1=5
or -v/u =5
or v= -5u
now using mirror formula
1/v+1/u. =1/f
or -1/5u + 1/u = -2/3
or u =-1.2 cm
object distance=1.2 cm left from mirror
______________________
========================
1.) reflection angle=incident angle
reflection angle=30°
hence it will make (90-30=60°) with mirror ..
2.)h2/h1=5
or -v/u =5
or v= -5u
now using mirror formula
1/v+1/u. =1/f
or -1/5u + 1/u = -2/3
or u =-1.2 cm
object distance=1.2 cm left from mirror
______________________
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