Reflection of Light
By Plane and Spherical Mirrors
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Laughing Mirrors use combination of Spherical Mirrors and Plane Mirrors. Is this image real or virtual? |
Very Short Question Answers (Based on NCERT Chapter)
Q1: What is the position of the object, when we get a diminished image with a concave mirror?
Answer: Beyond C (centre of curvature)
Q2: What are Marginal rays?
Answer: The rays which strike the mirror surface near the periphery are called marginal rays.
Q3: What type of rear mirrors are used by drivers in automobiles?
Answer: Convex mirrors
Q4: What is the relation between the radius of curvature (R) and focal length (f) of a concave mirror?
Answer: R = 2f
Q5: What is a focal length in case of spherical mirrors?
Answer: It is the distance between focal length and focus.
Q6: An object is moving with a speed v towards a plane mirror, what is the speed of the image?