Question

a convex mirror used on sone vehicle for watching rear view has radius of 10 cm if a bus at a distance of 50 m from this mirror find the nature location and size of image​

Answer 1

Given :

R= 10cm

f= R/2= 10/2= 5cm

Object distance= u= 50m =50x100=5000cm

v=?

formula :

1/f=1/v+1/u

1/v=1/f-1/u

=1/5+ 1/5000

= 1000+1/5000

==1001/5000

v=5000/1001=4.99cm

magnification =m= -v/u = -4.99/-5000=0.000998

nature of image :

• virtual
• erect
• diminished

size of image can e known by hi=mx ho

if ho is known hi can be calculated