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प्रश्न
A student wants to obtain an erect image of an object using a concave mirror of 10 cm focal length. What will be the distance of the object from mirror?
विकल्प
Less than 10 cm
10 cm
between 10 cm and 20 cm
more than 20 cm
उत्तर
Less than 10 cm
Explanation:
Only when the object is positioned between the pole and the focus can a concave mirror produce an upright image.
Distance between pole and focus = Focal length = 10 cm
As a result, the object can be placed less than 10 cm from the mirror. As a result, the image created when an object is put between the pole and the focus. The virtual, upright, and expanded concave mirror.
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संबंधित प्रश्न
Draw ray diagrams to show the principal focus of a concave mirror.
A spherical mirror produces an image of magnification -1.0 on a screen placed at a distance of 30 cm from the pole of the mirror.
(i) Write the type of mirror in this case.
(ii) What is the focal length of the mirror ?
(iii) What is the nature of the image formed ?
(iv) Draw the ray diagram to show the image formation in this case.
A concave mirror produces three times magnified image on a screen. If the object is placed 20 cm in front of the mirror, how far is the screen from the object.
Give two uses of concave mirrors. Explain why you would choose concave mirrors for these uses.
One of the following does not apply to a concave mirror this is:
(a) focal length is negative
(b) image distance can be positive or negative
(c) image distance is always positive
(d) height of image can be positive or negative
An object is placed just outside the principal focus of concave mirror. Draw a ray diagram to show how the image is formed, and describe its size, position and nature.
A real image of an object is to be obtained. The mirror required for this purpose is:
(a) convex
(b) concave
(c) plane
(d) either convex or concave
Which of the following can make a parallel beam of light from a bulb falls on it?
(a) concave mirror as well as concave lens
(b) convex mirror as well as concave lens
(c) concave mirror as well as convex lens
(d) concave mirror as well as convex lens
Under which of the following conditions a concave mirror can form an image larger than the actual object?
______ mirrors magnify the object placed close to them.
