Question

an object of height 2cm is kept in front of a spherical mirror at a distance 20cm it's focal length is 15cm. find the height of the image and the distance from the mirror where the image is formed

Answer 1

Answer: file all queations

Explanation:

Answer 2

Answer:

ho=2 cm

u= -20 cm

f = 15 cm

1/u+1/v=1/f

-1/20+1/v= 1/15

(-1v+20)/=20/15

- v +20=4/3

-3v+60=4

v= 56/3= 18.66

therefore v is + hence mirror is convex

hi/ho= -v/u

hi/2= - (56/3)/-20= 56/60= 14/15

15hi= 28

hi= 28/15= 1.866