A point source of light is located 20cm in front of a convex mirror with f=15cm. Determine the positions and character of the image point.

A point source of light is located 20cm in front of a convex mirror wi

1.	A point source of light is located 20cm in front of a convex mirror with f=15cm. Determine the positions and character of the image point.
Answer» Solution :`1/u+1/v=1/f` Here `u=-20 cm, f=15 cm` `1/v=1/f-1/u= 1/(15 cm)-1/(20 cm)=35/(300 cm)=7/(60 cm)` v=8.6 cm As v is positive, the IMAGE is located behind the MIRROR.