When a spherical mirror is held towards the sun and its sharp image is formed on a piece of carbon paper for some time, a hole is burnt in the carbon paper.

(a) What is the nature of spherical mirror?

(b) Why is a hole burnt in the carbon paper?

(c) At which point of the spherical mirror the carbon paper is placed?

(d) What name is given to the distance between spherical mirror and carbon paper?

(e) What is the advantage of using a carbon paper rather than a white paper?

Open in App

Solution

(a) Concave mirror
(b) A lot of sun’s heat rays are concentrated at the point of sun’s image which burns the hole in carbon paper.
(c) At the focus
(d) Focal length
(e) A black carbon paper absorbs more heat rays and hence burns a hole more easily (than a white paper).

Suggest Corrections

Similar questions

Q. When a spherical mirror held towards the sun its sharp image is formed on a piece of carbon paper for same time, a hole is burnt in the carbon paper.

When sunlight is concentrated on a piece of paper by a spherical mirror or lens, then a hole can be burnt in it. For doing this, the paper must be placed at the focus of : (a) either a convex mirror or convex lens (b) either a concave mirror or concave lens (c) either a concave mirror or convex lens (d) either a convex mirror or concave lens

Q. A man writes his biodata with carbon pencil on the plane paper having mass 150 mg. After writing his biodata, he weighs the written paper and find its mass 152 mg. What is the number of carbon atoms present in the paper?

Q. What happens when moist blue litmus paper is placed in a jar containing carbon dioxide?

Q. Why does obtaining the image of the sun on a paper with the help of a concave mirror burn the paper?

Join BYJU'S Learning Program

(a) Concave mirror (b) A lot of sun’s heat rays are concentrated at the point of sun’s image which burns the hole in carbon paper. (c) At the focus (d) Focal length (e) A black carbon paper absorbs more heat rays and hence burns a hole more easily (than a white paper).

(a) Concave mirror
(b) A lot of sun’s heat rays are concentrated at the point of sun’s image which burns the hole in carbon paper.
(c) At the focus
(d) Focal length
(e) A black carbon paper absorbs more heat rays and hence burns a hole more easily (than a white paper).