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प्रश्न
Name the type of mirror used in the following situation:
Headlights of a car
Support your answer with reason.
उत्तर
Concave Mirror: This is because concave mirrors can produce a powerful parallel beam of light when the light source is placed at their principal focus.
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संबंधित प्रश्न
Draw a ray diagram to show the path of the reflected ray corresponding to an incident ray of light parallel to the principal axis of a convex mirror and show the angle of incidence and angle of reflection on it.
Draw ray diagrams to show the principal focus of a concave mirror.
Draw ray diagrams to show the principal focus of a convex mirror.
The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?
Fill in the following blank with suitable word:
The focal length of a concave mirror is the distance from the ......... to the mirror.
Draw diagram to represent the action of a concave mirror on a beam of parallel light rays. Mark on this diagram principal axis, focus F, centre of curvature C, pole P and focal length f, of the concave mirror.
Copy this figure in your answer book and show the direction of the light ray after reflection:
Which type of mirror is used in a solar furnace? Support your answer with reason.
An object is placed at a distance of 10 cm from a concave mirror of focal length 20 cm.
Calculate the image distance.
A man holds a spherical shaving mirror of radius of curvature 60 cm, and focal length 30 cm, at a distance of 15 cm, from his nose. Find the position of image, and calculate the magnification.
If a concave mirror has a focal length of 10 cm, find the two positions where an object can be placed to give, in each case, an image twice the height of the object.
The mirror which can form a magnified image of an object is:
(a) convex mirror
(b) plane mirror
(c) concave mirror
(d) both convex and concave mirror
In the following diagram. MM' is a concave mirror and AB is an object. Draw on your answer-sheet a ray diagram to show the formation of image of this object.
A student determines the focal length of a device 'X' by focusing the image of a distant object on a screen placed 20 cm from the device on the same side as the object. The device 'X' is
(a) Concave lens of focal length 10 cm
(b) Convex lens of focal length 20 cm
(c) Concave mirror of focal length 10 cm
(d) Concave mirror of focal length 20 cm
Why are concave mirrors used in solar devices?
A _____________ mirror is used by a dentist.
______ is used as reflectors in torchlight.
The radius of curvature of a concave mirror whose focal length is 5cm is ______
The image formed by concave mirror is real, inverted and of the same size as that of the object. The position of object should be ______.
The concave reflecting surface of a torch got rusted. What effect would this have on the beam of light from the torch?
