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प्रश्न
Which are the two convenient rays that are chosen to construct the image by a spherical mirror for a given object? Explain with the help of suitable ray diagrams.
उत्तर
Two convenient rays that are chosen to construct the image by a spherical mirror for a given object :
- A ray passing through the centre of curvature: A ray of light passing through the centre of curvature of a concave mirror or a ray directed in the direction of the centre of curvature of a convex mirror is reflected back along the same path after reflection.
- A ray parallel to the principal axis: A ray of light parallel the principal axis, after reflection pass through the principal focus in case of a concave mirror or appears to diverge from it in case of a convex mirror.
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संबंधित प्रश्न
An image formed by a ______ mirror is always of the same size as that of the object.
How is a spherical mirror used to diverge a beam of light from a point? Name the type of mirror used.
Name the spherical mirror which (i) diverges (ii) converges the beam of light incident on it. Justify your answer by drawing a ray diagram in each case.
Complete the following diagrams shown in Fig. by drawing the reflected ray for each of the incident ray A and B.
Draw a ray diagram to show the formation of image of an object kept in front of a convex mirror. State three characteristics 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).
Define the term Principal axis.
Define the term Focus of a concave mirror.
If the focal length of a spherical mirror is 10 cm, what is the value of its radius of curvature?
Define focal length.
