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प्रश्न
Explain the following term related to spherical lenses: focal length
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उत्तर
Focal Length:-
The focal length of a lens is the distance between optical centre and principal focus of the lens.
संबंधित प्रश्न
We can obtain a real, enlarged and inverted image by a concave mirror.
Find out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.
Which type of mirror can form a real image?
The letter F is placed in front of a plane mirror:
What is the name of the phenomenon involved?
The shiny outer surface of a hollow sphere of aluminium of radius 50 cm is to be used as a mirror:
- What will be the focal length of this mirror?
- Which type of spherical mirror will it provide?
- State whether this spherical mirror will diverge or converge light rays.
A diverging lens is used in ______.
State the number of images of an object placed between two mirrors, formed in each case when mirrors are inclined to each other at (a) 90°, and (b) 60°.
Define the following term in relation to concave mirror.
Center of curvature
Define the following term in relation to concave mirror.
Focal length
Define focal length.
