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प्रश्न
A ray of light is incident normally on a plane mirror. What will be the
angle of reflection?
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उत्तर
The angle of reflection is 0o in accordance with the first law of reflection, which states that the angle of incidence is equal to the angle of reflection.
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संबंधित प्रश्न
One half of a convex lens of focal length 10 cm is covered with a black paper. Can such a lens produce an image of a complete object placed at a distance of 30 cm from the lens? Draw a ray diagram to justify your answer. A 4 cm tall object is placed perpendicular to its principal axis of a convex lens of focal length 20 cm. The distance of the object from the lens is 15 cm. Find the nature, position and the size of the image.
Explain the following term related to spherical lenses:- principal axis
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.
What is a spherical mirror?
State the kind of mirror used
(a) by a dentist, and
(b) as a street light reflector.
An optical device has been given to a student and he determines its focal length by focusing the image of the sun on a screen placed 24 cm from the device on the same side as the sun. Select the correct statement about the device.
(A) Convex mirror of focal length 12 cm
(B) Convex lens of focal length 24 cm
(C) Concave mirror of focal length 24 cm
(D) Convex lens of focal length 12 cm
Name the mirrors shown in Figure (a) and (b).
Does the mirror mentioned in part (b) form real image for all locations of the object?
What is meant by magnification? Write its expression. What is its sign for the (a) real (b) virtual, image?
State the kind of mirror used
(a) By a dentist,
(b) As a search-light reflector.
How will you distinguish between a plane mirror, a concave mirror and a convex mirror, without touching them?
Define the following term in relation to concave mirror.
Pole
What is the relation between focal length and radius of curvature of a concave mirror?
Is real image always inverted?
In the following figure shows a concave mirror with its pole (P), focus (F) and centre of curvature (C). Draw a ray diagram to show the formation of the image of an object AB by the concave mirror.
Which of the following has curved reflecting surface?
A converging lens of focal length f is placed at a distance 0.3 m from an object to produce an image on a screen 0.9 m from the lens. With the object and the screen in the same positions, an image of the object could also be produced on the screen by placing a converging lens of focal length.
