Home
Class 11
PHYSICS
STATEMENT-1 A convex lens of focal lengt...

STATEMENT-`1` A convex lens of focal length (f=1.5) behaves as a diverging lens when immersed in carbon di-sulphide of higher refractive index (f=1.65)
`STATEMENT 2` the focal length of lens does not depend on the colour of light used.

A

STATEMENT -`1`is true statement `2` is true,Statement -`2`is a correct explanation for statement -`1`

B

STATEMENT -`1`is true statement `2` is true,Statement -`2`is a not a correct explanation for statement -`1`

C

Statement -`1`is true,Statement -`2`is False

D

Statement -`1`is False ,Statement -`2`is True

Text Solution

Verified by Experts

The correct Answer is:
B
Since `mu=(mu_(g))/(mu_(cs))=(1.5)/(1.65)lt1`
From `(1)/(f)=(mu-1)((1)/(R_(1))-(1)/(R_(2))) rArr flt0`
Therefore the lens behaves as a diverging lens.Hence (B) is corect option.
Promotional Banner

Similar Questions

Explore conceptually related problems

Why does a convex lens of glass mu = 1.5 behave as a diverging lens when immersed in carbon disulphide of mu = 1.65 ?

Assertion : A convex lens of glass (mu = 1.5) behave as a diverging lens when immersed in carbon disulphinde of higher refractive index (mu = 1.65) . Reason : A diverging lens is thinner in the middle and thicker at the edges.

Focal length of a convex lens of refractive index 1.5 is 2 cm. Focal length of lens when immersed in a liquid of refractive index 1.25 will be

A plano-convex lens is made of refractive index of 1.6. The focal length of the lens is

A convex lens of focal length 20 cm made of glass of refractive index 1.5 is immersed in water having refractive index 1.33 . The change in the focal length of lens is

Assertion : The focal length of lens does not change when red light is replaced by blue light. Reason : The focal length of lens does not depends on colour of light used.

Assertion : The focal length of the lens does not change when red light is replaced by blue light. Reason : The focal length of lens does not depends on colour of light used.

A diverging lens of focal length 10 cm having refractive index 1.5 is immersed in a liquid of refractive index 3. The focal length and nature of the lens in liquid is

A thin convex lens of refractive index 1.5cm has 20cm focal length in air. If the lens in completely immersed in a liquid of refractive index. 1.6, then its focal length will be