Q.3. A beam of light converges towards a point O, 10 cm behind a concave mirror of focal length 20 cm. Where is the image formed?
(Ans: v = - 20 3   c m )

Dear Student ,
F = -20 cm 

u = -10 cm 
Now from the mirror equation we can write that ,


1/f = 1/u + 1/v   -1/20 = -1/10 + 1/v   1/v = 1/20   v = 20 cm

Regards

  • -2
What are you looking for?