science - light

Class 7 - Science

Light

Q&A
Question:

State the characteristics of the image formed by a plane mirror.

Answer:

(i) Plane mirror forms an erect image.
(ii) It forms a virtual image.
(iii) Size of the image is same as that of the object.
(iv)Image is formed at the same distance behind the mirror as the object stands in front of it.
(v) Image formed is a laterally inverted image i.e., right hand side of the object seems to be the left hand side and vice-versa.



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Questions and Answers


Light - Questions
1.

Mark ‘T’ if the statement is true and ‘F' if it is false:
(a) We can obtain an enlarged and erect image by a convex mirror. (T/F)
(b) A concave lens always form a virtual image. (T/F)
(c) We can obtain a real, enlarged and inverted image by a concave mirror. (T/F)
(d) A real image cannot be obtained on a screen. (T/F)
(e) A concave mirror always form a real image. (T/F)


Answer
2.

State two differences between a convex and a concave lens.


Answer
3.

Fill in the blanks:
(a) An image that cannot be obtained on a screen is called ___________ .
(b) Image formed by a convex is __________ always virtual and smaller in size.
(c) An image formed by a __________ mirror is always of the same size as that of the object.
(d) An image which can be obtained on a screen is called a __________ image.
(e) An image formed by a concave __________ cannot be obtained on a screen.


Answer
4.

Give one use each of a concave and a convex mirror.


Answer
5.

State two differences between a convex and a concave lens.


Answer
6.

Match the items given in Column I with one or more items of Column II
ncert-solutions-class-7-science-chapter-15-light-01


Answer
7.

State the characteristics of the image formed by a plane mirror.


Answer
8.

State the characteristics of the image formed by a plane mirror.


Answer
9.

Which type of lens forms always a virtual image?


Answer
10.

Which type of mirror can form a real image?


Answer
11.

Find out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.


Answer
12.

What is a virtual image? Give one situation where a virtual image is formed.


Answer
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