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प्रश्न
A ray of light is incident on a plane mirror at an angle of 30°. What is the angle of reflection
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उत्तर
The angle of reflection is 30⁰ as the angle of incidence is equal to the angle of reflection, in accordance with the first law of reflection.
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संबंधित प्रश्न
An image formed by a ______ mirror is always of the same size as that of the object.
Match the items given in Column I with one or more items of Column II.
| Column I | Column II | ||
| (a) | A plane mirror | (i) | Used as a magnifying glass. |
| (b) | A convex mirror | (ii) | Can form image of objects spread over a large area. |
| (c) | A convex lens | (iii) | Used by dentists to see enlarged image of teeth. |
| (d) | A concave mirror | (iv) | The image is always inverted and magnified. |
| (e) | A concave lens | (v) | The image is erect and of the same size as the object. |
| (vi) | The image is erect and smaller in size than the object. |
A ray of light strikes a plane mirror at an angle of 40° to the mirror surface. What will be the angle of reflection?
Name the spherical mirror which has:
(a) virtual principal focus.
(b) real principal focus.
A student obtained a sharp image of a burning candle, placed at the farther end of a laboratory table, on a screen using a concave mirror. For getting better value of focal length of the mirror, the subject teacher suggested him for focusing a well illuminated distant object. What should the student do?
(A) He should move the mirror away from the screen.
(B) He should move the mirror slightly towards the screen.
(C) He should move the mirror as well as the screen towards the newly selected object.
(D) He should move only the screen towards the newly selected object.
Three mirrors are created from a single sphere. Which of the following - pole, centre of curvature, radius of curvature, principal axis - will be common to them and which will not be common?
Name the two kinds of spherical mirrors and distinguish between them.
Name the kind of mirror used to obtain :
A real and enlarged image
What is meant by magnification? Write its expression. What is its sign for the (a) real (b) virtual, image?
An object 5 cm high forms a virtual image of 1.25 cm high, when placed in front of a convex mirror at a distance of 24 cm. Calculate:
- the position of the image
- the focal length of the convex mirror.
Select the correct option:
A mirror forms a virtual image (diminished) of an object, whatever be the position of object:
Define the following term:
convex mirror
Define the following term in relation to concave mirror.
Principal focus
Complete the following diagrams shown in the below figure by drawing the reflected ray for each incident ray.
