Which of the following is correct?

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

An image is formed at the opposite side of the lens as the object. The sign on the image distance will be ____ the object distance.

1. Same as that of
2. Opposite to that of
3. Always positive
4. Always negative

A magnifying glass is used to see an enlarged image of a fine text. In that case, which of the following is true for the object distance and the image distance?

1. Both have the same sign
2. Both have different signs
3. The object distance is positive, and the image distance is negative
4. The object distance is negative, and the image distance is positive

An object is situated at an infinite distance from a concave lens of focal length 34 cm. Its image will be formed at a distance of ___ cm from the lens.