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प्रश्न
At the point of incidence, a line drawn at right angles to the surface, separating the two media, is called the normal.
विकल्प
True
False
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उत्तर
True.
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संबंधित प्रश्न
Why do we prefer a convex mirror as a rear-view mirror in vehicles?
In a convex spherical mirror, reflection of light takes place at:
(a) a flat surface
(b) a bent-in surface
(c) a bulging-our surface
(d) an uneven surface
Fill in the following blank with a suitable word:
A ray of light which is parallel to the principal axis of a convex mirror, appears to be coming from ............ after reflection from the mirror.
The angle formed between the normal and the refracted ray is known as the angle of incidence.
A ............ mirror always forms a virtual image.
A 5 cm tall object is placed perpendicular to the principle axis of a convex lens of focal length 12 cm. The distance of the object from the lens is 8 cm. Using the lens formula, find the position, size and nature of the image formed.
Numerical problem.
A concave mirror produces three times magnified real image of an object placed at 7 cm in front of it. Where is the image located? (Ans: 21 cm in front of the mirror)
The nature of image formed by a convex mirror when the object distance from the mirror is less than the distance between pole and focal point (F) of the mirror would be ______.
Assertion: A real image cannot be produced by plane or convex mirror.
Reason: The focal length of a convex mirror is always taken as positive.
Higher-Order Thinking Skills:
A convex mirror is in water. What should be the change in its focal length?
