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प्रश्न
State two uses of a concave mirror.
Give the uses of a concave mirror.
उत्तर १
Two uses of concave mirror:
(i) It is used as a shaving mirror.
(ii) It is used as reflector in torch, head light of automobiles etc.
उत्तर २
The uses of a concave mirror are
(i) In torches and headlights: The source of light is placed at the focus to obtain a parallel beam of light.
(ii) In floodlights: The source of light is placed just beyond the center of curvature so as to get an intense beam of light.
(iii) Reflecting mirrors for projector lamps: The object is placed at the center of curvature to obtain an image of the same size.
- To collect heat radiations in solar devices: Heat radiations from the sum coming from infinity are brought to focus by a concave mirror in its focal plane.
- Shaving mirror, dentist’s mirror: It produces an erect virtual and highly magnified image of an object placed between its pole and focus.
vi. Solar furnaces: Large concave mirrors are used to concentrate sunlight to produce heat in a solar furnace.
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संबंधित प्रश्न
A student used a device (X) to obtain/focus the image of a well illuminated distant building on a screen (S) as shown below in the diagram. Select the correct statement about the device (X).
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What name is given to the distance between spherical mirror and carbon paper?
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How is a spherical mirror used to converge a beam of light at a point? Name the type of mirror used.
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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.
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Select the correct option:
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Define the following term in relation to concave mirror.
Pole
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Is real image always inverted?
Complete the following diagrams shown in the below figure by drawing the reflected ray for each incident ray.
Define the term Pole.
Draw a ray diagram to show that a convex mirror has a wider field of view.
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Which of the following has curved reflecting surface?
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Define the following terms in the context of a diverging mirror:
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Draw a labelled ray diagram to illustrate your answer.
