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प्रश्न
Name the mirrors shown in Figure (a) and (b).
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उत्तर
(i) In figure (a) a convex mirror is shown.
In figure (b) a concave mirror is shown.
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संबंधित प्रश्न
A student focused the Sun rays using an optical device 'X' on a screen S as shown.
From this it may be concluded that the device 'X' is a (select the correct option)
(A) Convex lens of focal length 10 cm.
(B) Convex lens of radius of curvature 20 cm.
(C) Convex lens of focal length 20 cm.
(D) Concave mirror of focal length 20 cm.
A coin placed at the bottom of a vessel appears to be raised when water is poured in the vessel.
State the direction of incident ray which after reflection from a spherical mirror gets reflected along its own path. Give a reason.
Explain the meaning of the terms focus and focal length in case of a convex mirror, with the help of suitable ray diagram.
(a) When a concave mirror is used as a shaving mirror, where is the person's face in relation to the focus of mirror?
(b) State three characteristics of the image seen in part (a).
Draw a ray diagram to show the formation of the image, when the object is placed between optical centre and principal focus of a convex lens.
State the signs and values of magnifications in the above mentioned case.
Define the term principal focus in case of convex mirror. Draw a convex mirror and show its principal focus and focal length clearly.
The boxes in figure (a, b, c) represent mirrors; insert a mirror which will reflect the incident ray as shown in the diagram.
For a spherical mirror, ______ is true.
In normal adjustment, for a refracting telescope, the distance between objective and eye piece is 30 cm. The focal length of the objective, when the angular magnification of the telescope is 2, will be ______.
