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प्रश्न
Give any two applications of a concave and convex mirror.
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उत्तर
- Concave mirrors:
- Concave mirrors are used while applying make–up or shaving, as they provide a magnified image.
- They are used in torches, search lights, and head lights as they direct the light to a long distance.
- Convex mirrors:
- Convex mirrors are used in vehicles as rearview mirrors because they give an upright image and provide a wider field of view as they are curved outwards.
- They are found in the hallways of various buildings including hospitals, hotels, schools, and stores. They are usually mounted on a wall or ceiling where hallways make sharp turns.
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संबंधित प्रश्न
To construct ray diagrams, two rays of light are generally so chosen that it is easy to determine their directions after reflection from a mirror. Choose two such rays and state the path/direction of these rays after reflection from a concave mirror. Use these two rays to find the position and nature of the image of an object placed at a distance of 8 cm from a concave mirror of focal length 12 cm.
The radius of curvature of a spherical mirror is 20 cm. What is its focal length?
Fill in the following blank with suitable word:
The focal length of a concave mirror is the distance from the ......... to the mirror.
Draw the following diagram in your answer book and show the formation of image with the help of suitable rays:
Which mirror is used as a torch reflector? Draw a labelled diagram to show how a torch reflector can be used to produce a parallel beam of light. Where is the bulb placed in relation to the torch reflector?
The angle of incidence for of light passing through the centre of curvature of a concave mirror is:
(a) 45°
(b) 90°
(c) 0°
(d) 180°
Write down a formula for the magnification produced by a concave mirror.
In terms of height of object and height of image.
Why are concave mirrors used in solar devices?
______ mirrors magnify the object placed close to them.
