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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
Explain the following term related to spherical lenses: focal length
Which type of mirror can form a real image?
The shiny outer surface of a hollow sphere of aluminium of radius 50 cm is to be used as a mirror:
State whether this spherical mirror will diverge or converge light rays.
The diagram below in Figure, shows a convex mirror. C is its centre of curvature and F is its focus. (i) Draw two rays from A and hence locate the position of image of object OA. Label the image IB. (ii) State three characteristics of the image.
An object 5 cm high is placed at a distance 60 cm in front of a concave mirror of focal length 10 cm. Find the position and size of the image.
Draw a ray diagram in each of the following cases to show the formation of image, when the object is placed :
(i) between the optical centre and principal focus of a convex lens.
(ii) anywhere in front of a concave lens.
(iii) at 2F of a convex lens.
State the signs and values of magnifications in the above-mentioned cases (i) and (ii).
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.
What is the relation between focal length and radius of curvature of a concave mirror?
Define the term Aperture.
Complete the following diagrams shown in the below figure by drawing the reflected ray for each incident ray.
Define the term Centre of curvature.
The following Figure shows a concave mirror MM' on which a ray of light incident from a point P gets reflected to meet the principle axis at O.
(a) Find, by construction, the position of the centre of curvature of the concave mirror.
(b) Write down the value for the radius of curvature of the mirror.
(c) Calculate the focal length of the mirror.
(d ) Which relation is used in deducing the focal length from the radius of curvature?
The distance from the pole to the focus is called ______.
For a spherical mirror, ______ is true.
