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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.
Why is a hole burnt in the carbon paper?
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उत्तर
A concave mirror converges light rays, and in this case it will converge the incoming parallel rays of the sun at its focus. Since the carbon paper was kept at the focus of the concave mirror, the hole was burnt into it.
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संबंधित प्रश्न
What happens when a ray of light falls normally (or perpendiculary) on the surface of a plane mirror?
A ray of light strikes a plane mirror at an angle of 40° to the mirror surface. What will be the angle of reflection?
The diverging lens in part (a) is replaced by a converging lens also of focal length 100 mm. The object remains in the same position and an image is formed by the converging lens. Compare two properties of this image with those of the image formed by the diverging lens in part (a).
What do you mean by the term dispersion?
What is a spherical mirror?
Three mirrors are created from a single sphere. Which of the following - pole, centre of curvature, radius of curvature, principal axis - will be common to them and which will not be common?
Define the terms pole, principal axis and centre of curvature with reference to a spherical mirror.
Discuss the position and nature of image formed by a concave mirror when an object is moved from infinity towards the pole of mirror.
Name the kind of mirror used to obtain:
A real and diminished image.
(a) When a concave mirror is used as a shaving mirror, where is the person's face in relation to the focus of mirror?
(b) State three characteristics of the image seen in part (a).
Upto what maximum distance from the pole the image in a convex mirror can be obtained? what will be the location of object then ?
Define the following term:
spherical mirror
What do you understand by the term real image?
The boxes in figure (a, b, c) represent mirrors; insert a mirror which will reflect the incident ray as shown in the diagram.
AB is the object, A'B' is the image, and MM' is the position of the mirror. Complete the ray diagram showing the formation of the image and find the focal length of the mirror.
The distance from the pole to the focus is called ______.
Define the following terms in the context of a diverging mirror:
- Principal focus
- Focal length
Draw a labelled ray diagram to illustrate your answer.
