When the wavelenght of the light used is...

When the wavelenght of the light used is increased, the focal length of a spherical mirror

A

remains the same

B

decreases to half its value.

C

decreases slightly

D

increases.

Text Solution

Verified by Experts

The correct Answer is:

A

Topper's Solved these Questions

RAY OPTICS
TARGET PUBLICATION|Exercise COMPETITIVE THINKING|68 Videos
RAY OPTICS
TARGET PUBLICATION|Exercise EVALUATION TEST|16 Videos
RAY OPTICS
TARGET PUBLICATION|Exercise EVALUATION TEST|16 Videos
OPTICS
TARGET PUBLICATION|Exercise EXERCISE|447 Videos
REFRACTION OF LIGHT
TARGET PUBLICATION|Exercise EVALUATION TEST|15 Videos

Similar Questions

Explore conceptually related problems

What are the two types of spherical mirror?

Choose the correct alternative and write it along with its allotted alphabet: The focal length of a spherical mirror with radius of curvature 30 cm is ........ A. 30 cm B. 60 cm C. 15cm D. 45 cm

If the focal length of the objective lens is increased then

Define the following: Focal length of a mirror (f)

Answer the following State the relationship between object distance (u), image distance (v) and focal length (f) of a spherical mirror. What is this relationship known as?

Answer the following questions: What is a spherical mirror?

What sign conventions are used for reflection from a spherical mirror?

When an object is placed at 75 cm in front of a concave mirror, the magnification produced by the mirror is ( - 0.5). Find the focal length of the mirror.

Answer the following questions: When an object is kept at 50 cm in front of a concave mirror, Its real image is obtained at the same distance from the mirror. What is the focal length of the mirror?

An object placed 20 cm in front of a convex mirror is found to have an image 15cm behind the mirror. Find the focal length of the mirror.

TARGET PUBLICATION-RAY OPTICS-CRITICALTHINKING

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
|
The lens shown in the figure drawn below is made of two different mate...
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
|