Question

an object 4 centimetre in size is placed at a distance of 25 cm from a concave mirror of focal length 15 cm find the position nature and height of the image​

Answer 1

Explanation:

u = 25 cm

f = -15 cm

object height = 4 cm

so, v = fu÷(f-u)

v = 9.375 cm

we have, v/u = h i/h o

9.375/25 = h i/4

h i = 1.5 cm

so, v is 9.375 cm from the pole

v is real and inverted ( v is positive )

height of the object is 1.5 cm

image is smaller than the object