Question

A 3cm tall object is placed at a distance of 7.5cm from a convex mirror of focal length 6cm.. Find the location, size and nature of the image

Answer 1

given :

ho= 3cm

u= - 7.5cm

f= 6cm

v=?

1/f= 1/v=+1/u

1/v= 1/f- 1/u

= 1/ 6 +1/7.5

=3/10

v= 10/3 =3.3 cm

m= - v/ u

= - 3.3 / -7.5 = 33/75 = 0.44

m= hi/ho

hi = m x ho

= 0.44 x 3

= 44x3/10

=1.32 cm

Answer 2

plz check this ans......
h1(height of object)=3cm
u(distance of object)=-7.5cm
f=6cm
mirror formula...
1/v +1/u =1/f
1/v +1/7.5 =1/6
v=3.3cm