# NCERT Class VII Science Solutions: Chapter 15 – Light Part 1

Question 1:

Fill in the blanks:

1. An image that cannot be obtained on a screen is called ____________.

2. Image formed by a convex __________ is always virtual and smaller in size.

3. An image formed by a __________ mirror is always of the same size as that of the object.

4. An image which can be obtained on a screen is called a _________ image.

5. An image formed by a concave ___________ cannot be obtained on a screen.

An image that cannot be obtained on a screen is called virtual image.

1. Image formed by a convex mirror is always virtual and smaller in size.

2. An image formed by a plane mirror is always of the same size as that of the object.

1. An image which can be obtained on a screen is called a real image.

2. An image formed by a concave lens cannot be obtained on a screen.

Question 2:

Mark ‘T’ if the statement is true and ‘F’ if it is false:

1. We can obtain an enlarged and erect image by a convex mirror. (T/F)

2. A concave lens always form a virtual image. (T/F)

3. We can obtain a real, enlarged and inverted image by a concave mirror. (T/F)

4. A real image cannot be obtained on a screen. (T/F)

5. A concave mirror always form a real image. (T/F)

1. We can obtain an enlarged and erect image by a convex mirror. (False)

2. A concave lens always form a virtual image. (True)

3. We can obtain a real, enlarged and inverted image by a concave mirror. (True)

4. A real image cannot be obtained on a screen. (False)

5. A concave mirror always form a real image. (False)

Question 3:

Match the items given in Column I with one or more items of Column II.

 Column I Column II A plane mirror Used as a magnifying glass. A convex mirror Can form image of objects spread over a large area? A convex lens Used by dentists to see enlarged image of teeth. A concave mirror The image is always inverted and magnified. A concave lens The image is erect and of the same size as the object. The image is erect and smaller in size than the object.