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प्रश्न
The distance from the pole to the focus is called ______.
पर्याय
pole length
focal length
principal axis
None of the above
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उत्तर
The distance from the pole to the focus is called focal length.
Explanation:
The distance from the pole (the center of a spherical mirror or lens) to the focus (the point where light rays converge or appear to diverge) is called the focal length.
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संबंधित प्रश्न
Name the spherical mirror which has:
(a) virtual principal focus.
(b) real principal focus.
What is a spherical mirror?
What do you understand by the focus and focal length of a spherical mirror? Show them on the separate diagrams for each of a concave mirror and a convex mirror.
Name the mirrors shown in Figure (a) and (b).
State the two convenient rays that are chosen to construct the image by a spherical mirror for a given object? Explain your answer with the help of suitable ray diagrams.
What type of mirror can be used to obtain a real image of an object?
Define the term principal focus in case of convex mirror. Draw a convex mirror and show its principal focus and focal length clearly.
Explain why a ray of light passing through the center of curvature of a concave mirror, gets reflected along with the same pattern.
