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प्रश्न
The height of the image formed by an object of height 10 cm placed in front of a plane mirror is __________.
(a) 5 cm
(b) 10 cm
(c) 15 cm
(d) 20 cm
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उत्तर
10 cm
The height of the image formed by a plane is always equal to the height of the object placed before it.
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संबंधित प्रश्न
What is the magnification of the images formed by plane mirrors and why?
Which type of mirror could be used as a dentist's mirror?
Which one of these circumstances enables a concave mirror to be used as a shaving mirror?
What sign (+ve or −ve) has been given to the following on the basis of Cartesian Sign Convention?
- Height of a real image.
- Height of a virtual image.
If the magnification of a body of size 1 m is 2, what is the size of the image?
If the magnification has a plus sign, then image is ______ and ______.
When an object is placed 20 cm from a concave mirror, a real image magnified three times is formed. Find:
(a) the focal length of the mirror.
(b) Where must the object be placed to give a virtual images three times the height of the object?
A dentist's mirror has a radius of curvature of 3 cm. How far must it be placed from a small dental cavity to give a virtual image of the cavity that is magnified five times?
An object 20 cm from a spherical mirror gives rise to virtual image 15 cm behind the mirror. Determine the magnification of the image and the type of mirror used.
A lens of focal length 12 cm forms an erect image three times the size of the object. The distance between the object and image is ______.
What is the nature of the image formed by a convex lens if the magnification produced by the lens is +3?
A small object is so placed in front of a convex lens of 5 cm focal length that a virtual image is formed at a distance of 25 cm. Find the magnification.
At what distance should an object be placed from a convex lens of focal length 18 cm to obtain an image at 24 cm from it on the other side? What will be the magnification produced in this case?
An erect image 2.0 cm high is formed 12 cm from a lens, the object being 0.5 cm high. Find the focal length of the lens.
Linear magnification produced by a convex lens can be:
(a) less than 1 or more than 1
(b) less than 1 or equal to 1
(c) more than 1 or equal to 1
(d) less than 1, equal to 1 or more than 1
An object is 0.09 m from a magnifying lens and the image is formed 36 cm from the lens. The magnification produced is:
(a) 0.4
(b) 1.4
(c) 4.0
(d) 4.5
An image formed on a screen is three times the size of the object. The object and screen are 80 cm apart when the image is sharply focussed.
Calculate focal length of the lens.
What is the nature of the image formed by a concave mirror if the magnification produced by the mirror is +4?
