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प्रश्न
When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper.
What is the advantage of using a carbon paper rather than a white paper?
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उत्तर
A carbon paper is a good absorber of sunlight; hence, it burnt quickly.
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संबंधित प्रश्न
A student obtains a sharp image of the distant window (W) of the school laboratory on the screen (S) using the given concave mirror (M) to determine its focal length. Which of the following distances should he measure to get the focal length of the mirror?
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 ______.
Write true or false
A virtual image formed by a spherical mirror is always erect and situated behind the mirror.
Explain the following term:
Incident ray
Draw diagram/diagrams to show them.
Name the kind of mirror used to obtain:
A virtual and diminished image
Write the spherical mirror's formula and explain the meaning of each symbol used in it.
How will you distinguish between a plane mirror, a concave mirror and a convex mirror, without touching them?
Answer the following question.
Write the modification in the curvature of the eye lens which enables us to see the nearby objects clearly?
Define the following term in relation to concave mirror.
Radius of curvature
Does the mirror name by your form a real image for all locations? Give a reason for your answer.
Is real image always inverted?
Define the term Pole.
Define the term Centre of curvature.
Define the term Principle focus.
An object is placed in front of a concave mirror as shown in the following figure. By scale drawing, find the nature of the image. Given f = 10 cm, v = 30 cm.
Complete the following diagrams shown in the below figure by drawing the reflected ray for each incident ray.
A ray of light is incident towards a plane mirror at an angle of 30° with the mirror surface. What will be the angle of reflection?
