An object of height 2 m is located at a distance of 50 cm from a convex lens of focal length 25 cm. The image is of height ____ m.

The image of an object located at a distance of 25 cm towards the left of a concave lens is formed at a distance of 5 cm at the same side of the lens. The magnification produced by the lens is ____.

1. 0.2
2. -0.2
3. 0.25
4. -0.25

The magnification produced by a concave lens is always ____.

1. Greater than 1
2. Negative
3. Positive
4. None of these

Which of the following is correct?

1. vh = uH
2. uh = vH
3. vuh = H
4. vh = uvH

Which of the following is a formula to measure the magnification produced by a lens?

1. v/u
2. -v/u
3. u/v
4. -u/v

What is the unit of measurement of magnification?

1. m
2. D
3. It is unitless
4. cm

Magnification is mathematically given by ____, H is the height of the image and h is the height of the object.

1. Hh
2. h/H
3. H/h
4. H²h

“The radius of a convex lens is always negative.”
This statement is _____.

1. True
2. False

A _____ image is always formed at the opposite side of a lens, and a _______ image is always formed at the same side of a lens as the object.

1. Real, virtual
2. Real, real
3. Virtual, virtual
4. Virtual, real

An object is located in front of a convex lens of focal length 53 cm at a distance of 106 cm. The image of this object will be formed at a distance of ____ cm from the lens.

An object is situated at an infinite distance from a convex lens of focal length 55 cm. Its image will be formed _____.

1. In the same side as the object
2. In the opposite side as the object
3. Behind the object
4. At optic center

An object is situated at an infinite distance from a convex lens of focal length 55 cm. Its image will be formed at a distance of ___ cm from the lens.

The radius of curvature of a convex lens is 190 cm. Its focal length is ____ cm.

The ray diagram below shows the image formation by a concave lens. Which of the following is true about different measurements?

1. f, u and v all are positive
2. f, u and v all are negative.
3. f is negative and u and v are positive.
4. f is positive and u and v are negative.

The ray diagram below shows a case of the image formation by a convex lens. Here the object distance is ____, and the image distance is _____.

1. Positive, positive
2. Positive, negative
3. Negative, positive
4. Negative, negative

The ray diagram below shows a case of the image formation by a convex lens. Here the object distance is ____, and the image distance is _____.

1. Positive, positive
2. Positive, negative
3. Negative, positive
4. Negative, negative