Science, asked by mintugogoi0987654321, 5 months ago

1. Define the principal focus of a concave mirror.
2. The radius of curvature of a spherical mirror is 20 cm. What is its focal length?
3. Name a mirror that can give an erect and enlarged image of an obiect

Answers

Answered by dharman565

5

Answer:

Light rays that are parallel to the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting from the mirror. This point is known as the principal focus of the concave mirror.
So, focal length = 21× radius of curvature = 21×20 cm = 10 cm. look at the picture above.
A concave mirror gives an erect and enlarged image of an object held between pole and principal focus of the mirror.

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