A double convex lens of focal 30 cm is made of glass of refractive index 1.6. When it is immersed in a liquid, the focal length becomes 126 cm. The refractive index of the liquid is :
1.4
1.5
1.33
1.6
A
1.4
B
1.5
C
1.6
D
1.33
Open in App
Solution
Verified by Toppr
Was this answer helpful?
5
Similar Questions
Q1
A thin convex lens of refractive index 1.5 has 20cm focal length in air. If the lens is completely immersed in a liquid refractive index 1.6, its focal length will be :
View Solution
Q2
A double convex thin lens made of glass of refractive index 1.6 has radii of curvature 15cm each. The focal length of this lens when immersed in a liquid of refractive index 163 is:
View Solution
Q3
A convex lens of focal length 30 cm. is made of a material of refractive index 53. When it is placed in a liquid its focal length is increased by 50 cm. The refractive index of the liquid is
View Solution
Q4
A thin lens made of glass (refractive index =1.5) of focal length f=16cm is immersed in a liquid of refractive index 1.42. If its focal length in liquid is f1, then the ratio f1f is closest to the integer
View Solution
Q5
A double convex lens made of a material of refractive index 1.5 and having a focal length of 10 cm is immersed in liquid of refractive index 3.0. The lens will behave as