Solutions of Reflection of Light (Page No- 178) - Physics By Lakhmir Singh, Class 10 Class 10 Notes | EduRev

Class 10 Physics Solutions By Lakhmir Singh & Manjit Kaur

Class 10 : Solutions of Reflection of Light (Page No- 178) - Physics By Lakhmir Singh, Class 10 Class 10 Notes | EduRev

The document Solutions of Reflection of Light (Page No- 178) - Physics By Lakhmir Singh, Class 10 Class 10 Notes | EduRev is a part of the Class 10 Course Class 10 Physics Solutions By Lakhmir Singh & Manjit Kaur.
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Lakhmir Singh Physics Class 10 Solutions Page No:178

Question 1: Name the spherical mirror which has :
virtual principal focus.
real principal focus.

Solution : (a) Convex mirror (b) Concave mirror

Question 2: Out of convex mirror and concave mirror, whose focus is situated behind the mirror ?

Solution : Convex mirror

Question 3: Find the focal length of a concave mirror whose radius of curvature is 32 cm.

Solution : Radius of curvature (R) = 32cm
Focal length (f) = ?
We know that
f = R/2
= 32/2
f = 16cm

Question 4: If the focal length of a convex mirror is 25 cm, what is its radius of curvature ?

Solution : Focal length (f) = 25 cm
Radius of curvature (R) = ?
We know that
f = R/2
25=R/2
R= 25 x 2
R = 50 cm.

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