The focal length of a concave-convex len...

The focal length of a concave-convex lens of radii of curvature 5 cm and 10 cm is 20 cm. what will be its focal length in water ? Given `.^(a)mu_(w) = 4//3`.

Text Solution

Verified by Experts

The correct Answer is:

`-80 cm`

Topper's Solved these Questions

RAY OPTICS
SL ARORA|Exercise TYPE F|10 Videos
RAY OPTICS
SL ARORA|Exercise TYPE I|12 Videos
RAY OPTICS
SL ARORA|Exercise TYPE A|15 Videos
OPTICAL INSTRUMENTS
SL ARORA|Exercise Problems for self practice|35 Videos
SOLIDS AND SEMICONDUCTOR DEVICES
SL ARORA|Exercise PROBLEM_TYPE|9 Videos

Similar Questions

Explore conceptually related problems

Radius of curvature of a concave mirror is 25 cm. What is its focal length?

The focal length of a convex mirrorr is 20cm its radius of curvature will be

The focal length of a convex mirror is 20 cm its radius of curvature will be

The focal length of a convex lens is 20 cm. What is its power?

A plano-convex lens (mu = 1.5) has a curved surface of radiys 15 cm. what is its focal length ?

The radii of curvature of a double concave lens are 30 cm and 45 cm. What is its focal length in water ? [""_(a)n_(g)=1.5, ""_(a)n_(w)=4//3]

The focal length of a convex lens of glass (mu = 1.5) in air is 30 cm. Find its focal length when the lens is placed in water (mu = 4//3) .

A biconvex lens (mu=1.5) has radius of curvature 20cm (both). find its focal length.

The radii of curvatures of a double convex lens are 15 cm and 30 cm, and its refractive index is 1.5. Then its focal length is -

The radii of curvature of the surfaces of a double convex lens are 20 cm and 30 cm . What will be its focal length and power in air and water respectively ? Refractive indices for glass and water are 3//2 and 4//3 respectively.

SL ARORA-RAY OPTICS-Problems For Self Practice

Fig. 6(b).54. shows a thin lens with centres of curvature C(1) and C(2...
Text Solution
|
A plano-convex lens (mu = 1.5) has a curved surface of radiys 15 cm. w...
Text Solution
|
The focal length of a concave-convex lens of radii of curvature 5 cm a...
Text Solution
|
A convex lens of refractive index 1.5 is immersed in a liquid of refra...
Text Solution
|
The two surfaces of a double concave lens are of curvature 10 cm and 4...
Text Solution
|
The focal length of a plano-convex lens is 20 cm in air. Refractive in...
Text Solution
|
The focal length of a convex lens of glass (mu = 1.5) in air is 30 cm....
Text Solution
|
A lens of refractive index mu becomes a lens of focal length f' when i...
Text Solution
|
The radii of curvature of each surface of a convex lens is 20 cm and t...
Text Solution
|
The radii of curvatureof double convex lens of glass (mu = 1.5) are in...
Text Solution
|
Where should an object be placed from a converging lens of focal lengt...
Text Solution
|
At what distance should an object be placed from a convex lens of foca...
Text Solution
|
A convex lens is placed on an optical bench and is moved till it gives...
Text Solution
|
A convex lens of focal length 30 cm is placed between a screen and a s...
Text Solution
|
An object is 60 cm in front of a thin lens, the image being 300 cm on ...
Text Solution
|
A source of light and a screen are placed 90 cm apart. Where should a ...
Text Solution
|
An object is placed at a distance of 1.5 m from a screen and a convex ...
Text Solution
|
The distance between a convex lens and a plane mirror is 15 cm. The pa...
Text Solution
|
A concave lens focal length 10 cm is placed on the axis of concave mir...
Text Solution
|
A concave lens is placed in the path of convergent rays. The rays are ...
Text Solution
|