CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

A thin lens of refractive  index 1.5 has a focal length of 15 cm in air. When the lens is placed in a medium of refractive index 4/3, its focal length will become


A
30 cm
loader
B
45 cm
loader
C
60 cm
loader
D
75 cm
loader

Solution

The correct option is D 60 cm
By using $$\dfrac{f_1}{f_2}=\dfrac{(_a\mu_g-1)}{(_l\mu_g-1)} \Rightarrow f_w=4f_a=4 \times 15=60\ cm$$

Physics

Suggest Corrections
thumbs-up
 
0


similar_icon
Similar questions
View More


similar_icon
People also searched for
View More



footer-image