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प्रश्न
Define the following term in the context of spherical mirrors:- Principal focus
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उत्तर
Principal focus of a spherical mirror:-
The focus (F) is the point on the principal axis of a spherical mirror where all the incident rays parallel to the principal axis meet or appear to diverge from after reflection.
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संबंधित प्रश्न
An image that cannot be obtained on a screen is called ______.
A virtual image larger than the object can be produced by a ______.
When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper.
Why is a hole burnt in the carbon paper?
A lens forms a real image 3 cm high of an object 1 cm high. If the separation of object and image is 15 cm, find the focal length of the lens.
Explain the following terms :
Pole, Centre of curvature, Radius of curvature, Principal axis. Show them on separate diagrams for each of the concave and convex mirrors.
Define the following terms in the context of spherical mirrors :
(i) Pole
(ii) Centre of curvature
(iii) Radius of curvature
(iv) Principal axis
The radius of curvature of a convex mirror is 40 cm. Find its focal length.
Select the correct option:
A mirror forms a virtual image (diminished) of an object, whatever be the position of object:
What do you understand by the term real image?
Does the mirror name by your form a real image for all locations? Give a reason for your answer.
