Q. A point object$O$is placed in front of a glass rod having spherical end of radius of curvature 30cm. The image would be formed at

A) 30 cm left
B) Infinity
C) 1 cm to the right
D) 18 cm to the left
Explanation

(a) By using formula,
$\frac{\mu ₂}{v} - \frac{\mu ₁}{u} = \frac{\mu ₂\ - \mu ₁}{R}$
$\Longrightarrow \frac{1.5}{v} - \frac{1}{( - 15)} = \frac{1.5 - 1}{+ 30}$
$\Longrightarrow v = \ - 30\ cm$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.