Question

1A)

A real image has the following characteristics:

(I) it cannot be formed by a diverging lens

(II) it is always inverted

(III) it can be formed only if the object is very far away

(IV) it must be on the same side of the lens as the object

The correct answers are

	III and IV
	I and IV
	II and IV
	I and II

1B)

A lens produces a diminished image. So

(I) the lens can be diverging

(II) if the lens is converging the image must be on the same side of the lens as the object

(III) if the lens is converging the image must be virtual

(IV) if the image is inverted the lens must be converging

The correct answers are

	II and IV
	I and III
	II and III
	I and IV

1C)

A lens produces an enlarged image. Therefore

(I) the image cannot be real.

(II) the image can be on the same side of the lens as the object

(III) the image can be upright produced by a converging lens

(IV) the image can be produced by a diverging lens

The correct answers are

	II and IV
	II and III
	I and II
	I and IV

1D)

A virtual image has the following characteristics:

(I) it is always upright

(II) its magnification is always positive

(III) it can be formed only if the object is between the lens and the focus

(IV) it cannot be formed by a converging lens

The correct answers are

	I, II and IV
	I and II
	I, II, III and IV
	I, II and III

Properties of images formed by lenses:

(I) If the image is enlarged and virtual, it must be a converging lens

(II) If the image is upright and enlarged, it must be a diverging lens.

(III) If the image is enlarged and real, it must be a diverging lens

(IV) If the image is diminished and upright, it must be a diverging lens.

The correct answers are

	II and III
	II and IV
	I and III
	I and IV

Answer 1