Two similar planoconvex lenses are combi...

Two similar planoconvex lenses are combined together in three different ways as shown in the adjoining figure. The ratio of the focal lengths in three cases will be

A

`2:2:1`

B

`1:1:1`

C

`1:2:2`

D

`2:1:1`

Text Solution

Verified by Experts

The correct Answer is:

B

Topper's Solved these Questions

RAY OPTICS
TARGET PUBLICATION|Exercise COMPETITIVE THINKING|60 Videos
RAY OPTICS
TARGET PUBLICATION|Exercise EVALUATION TEST|14 Videos
RAY OPTICS
TARGET PUBLICATION|Exercise EVALUATION TEST|14 Videos
MEASUREMENTS
TARGET PUBLICATION|Exercise EVALUATION TEST|17 Videos
REFRACTION OF LIGHT
TARGET PUBLICATION|Exercise EVALUATION TEST|12 Videos

Similar Questions

Explore conceptually related problems

Two identical slabs of given metal are joined together in two different ways as shown in figure. What is the ratio of the resistance of these two combinations?

Two similar p-n junctions can be connected in three different ways as shown in the figure. The two connections across which the potentional difference is same are. (a)

Two identical springs (springs constant K) are connected together in three different ways. In which case will the spring factor of the oscillation of the body be least ?

Two identical thin planoconvex lenses of refractive index n are silvered, one on the plane side and other on the convex side. The ratio of their for lengths is

Three cubes each of edge 3 cm long are placed together as shown in the adjoining figure . Find the surface area of the cuboid so formed :

When two thin lenses are kept in contanct, the focal length of the combination is

Two plano-convex lenses of focal lengths 20cm and 30cm are placed together to form a double convex lens. The final focal length will be

Two thin convex lenses of focal lengths 4 cm and 8 cm are separated by a distance of 4 cm in air. The combination will have the focal length

Three charges of (+2q), (-q) and (-q) are placed at the corners A,B and C of an equilateral triangle of side a as shown in the adjoining figure. Then the dipole moment of this combination is

TARGET PUBLICATION-RAY OPTICS-CRITICALTHINKING

When two or more lnses of magnification m(1) ,m(2), m(3) are kept in c...
Text Solution
|
A concave lens and a convex lens have same focal length of 20 cm and b...
Text Solution
|
If we need a magnification of 400 from compound microscope of tube len...
Text Solution
|
When objects at different distances are seen by the eye, which of the ...
Text Solution
|
If astronomical telescope of length 1.53m has magnifying powerof magni...
Text Solution
|
When we view object of height 15 m with a telescop of magnifying power...
Text Solution
|
The focal length of the objective and eye piece of a telescope are res...
Text Solution
|
The objective of telescope A has a diameter 3 times that of the object...
Text Solution
|
A fly is sitting on the objective of a telescop pointed to the moon ta...
Text Solution
|
An object is placed at a distance u from a concave mirror and its real...
Text Solution
|
The distance between an object and the screen is 75 cm. When a convex ...
Text Solution
|
Two similar planoconvex lenses are combined together in three differen...
Text Solution
|
A virtual cannot be caought on a screen, Yet when we see a virtual ima...
Text Solution
|
When the wavelenght of the light used is increased, the focal length o...
Text Solution
|
If two power of a thick lense is P(1) and that of a thin lens is P(2)...
Text Solution
|
How will you arrange the two plane mirros so that whatever may be the ...
Text Solution
|
An object is placed in front of a convex mirror at a distance of 50cm....
Text Solution
|
A square wire of side 3.0 cm is placed 25 cm away from a concave mirro...
Text Solution
|
If a lens is cut into two pieces perpendicular to the principal axis a...
Text Solution
|
Assertion : A concave mirror and convex lens both have the same focal ...
Text Solution
|