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प्रश्न
An object 10 cm high is placed at a distance of 20 cm in front of a spherical mirror of focal length 25 cm. By scale drawing find the nature, position, and magnification of the image in the following case:
Convex mirror
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उत्तर
Focal length =25 cm.
Object distance = 20 cm.
Height o f object = 10 cm.
The image is virtual, erect, and diminished.
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संबंधित प्रश्न
A student focused the Sun rays using an optical device 'X' on a screen S as shown.
From this it may be concluded that the device 'X' is a (select the correct option)
(A) Convex lens of focal length 10 cm.
(B) Convex lens of radius of curvature 20 cm.
(C) Convex lens of focal length 20 cm.
(D) Concave mirror of focal length 20 cm.
A virtual image larger than the object can be produced by a ______.
Name the two types of spherical mirrors. What type of mirror is represented by the:
back side of a shining steel spoon?
A small object is placed 150 mm away from a diverging lens of focal length 100 mm.
(i) Copy the figure below and draw rays to show how an image is formed by the lens.
Figure
(ii) Calculate the distance of the image from the lens by using the lens formula.
Define the terms pole, principal axis and centre of curvature with reference to a spherical mirror.
Name the mirror which always produces an erect and virtual image. How is the size of image related to the size of object?
Define the following term in relation to concave mirror.
Focal length
Define the term principal focus in case of convex mirror. Draw a convex mirror and show its principal focus and focal length clearly.
What is “aperture”?
