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प्रश्न
Select the correct option:
Which mirror is used in periscope?
विकल्प
concave mirror
convex mirror
Plane mirror
parabolic mirror
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उत्तर
Plane mirror
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संबंधित प्रश्न
What is a virtual image?
Mention the types of mirrors used as (i) rear view mirrors, (ii) shaving mirrors. List two reasons to justify your answers in each case.
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.
Figure shows a concave mirror with its pole at P, focus F and centre of curvature C. Draw ray diagram to show the formation of image of an object OA.
A straight stick partly dipped in water obliquely appears to be bent at the surface of the water.
What is the relation between focal length and radius of curvature of a concave mirror?
Define the term Normal.
Numerical problem.
The radius of curvature of a spherical mirror is 25 cm. Find its focal length.
