Question

an object of height 2 cm is placed at 30 cm from a concave mirror if the image found by the mirror is real in inverter and 1.5 time the object is size , focal length of the mirror and the image distance.​

Answer 1

Answer:

Size of object  ho=2cm

Size of the object  hi=?

Focal length  f=−12cm

Object distance  u=−20cm

Image distance  v=?

Using mirror formula

f1=v1+u1

−121=v1+−201

v1=60−5+3

v=−30cm

Magnification (M)=hohi=u−v=−2030=−1.5

hi=−1.5×2=−3cm

Image will be real, inverted and magnified.