Case Study and Passage Based Questions for Class 10 Science Chapter 10 Light Reflection and Refraction

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Home CBSE Class 10 Science Case Study Questions for Class 10 Science Case Study and Passage Based Questions for Class 10 Science Chapter 10 Light Reflection and Refraction

In CBSE Class 10 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.

Here, we have provided case based/passage based questions for Class 10 Science Chapter 10 Light Reflection and Refraction.

Case Study and Passage Based Questions for Class 10 Science Chapter 10 Light Reflection and Refraction

Case Study and Passage Based Questions for Class 10 Science Chapter 10 Light Reflection and Refraction

Class 10 Science · Chapter 10
1

Case Study 1: Image Formation by Spherical Mirrors

Read the passage carefully, then answer all five questions
Ch 10 · Light

The spherical mirror forms different types of images when the object is placed at different locations. When the image is formed on screen, the image is real and when the image does not form on screen, the image is virtual. When the two reflected rays meet actually, the image is real and when they appear to meet, the image is virtual.

A concave mirror always forms a real and inverted image for different positions of the object. But if the object is placed between the focus and pole. the image formed is virtual and erect.

A convex mirror always forms a virtual, erect and diminished image. A concave mirror is used as doctor’s head mirror to focus light on body parts like eyes, ears, nose etc., to be examined because it can form erect and magnified image of the object. The convex mirror is used as a rear view mirrors in automobiles because it can form an small and erect image of an object.

1
When an object is placed at the centre of curvature of a concave mirror, the image formed is
a larger than the object
b smaller than the object
c same size as that of the object
d highly enlarged.
Correct Answer (c) same size as that of the object ✅
Explanation

For a concave mirror, when an object is placed exactly at the center of curvature (C), the image is real, inverted, formed exactly at C, and is of the same size as the object.

2
No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be
a plane
b concave
c convex
d either plane or convex.
Correct Answer (d) either plane or convex. ✅
Explanation

Both plane mirrors and convex mirrors always form virtual and erect images regardless of the object’s distance from the mirror. A concave mirror forms inverted images for most distances.

3
A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top.
a Plane, convex and concave
b Convex, concave and plane
c Concave, plane and convex
d Convex, plane and concave
Correct Answer (c) Concave, plane and convex ✅
Explanation

Head bigger $\rightarrow$ Virtual, erect, and magnified image (characteristic of a concave mirror when object is near).
Middle portion same size $\rightarrow$ Virtual, erect, same size (characteristic of a plane mirror).
Legs smaller $\rightarrow$ Virtual, erect, diminished image (characteristic of a convex mirror).

4
To get an image larger than the object, one can use
a convex mirror but not a concave mirror
b a concave mirror but not a convex mirror
c either a convex mirror or a concave mirror
d a plane mirror.
Correct Answer (b) a concave mirror but not a convex mirror ✅
Explanation

A convex mirror always produces a diminished (smaller) image. A plane mirror produces an image of the exact same size. Only a concave mirror has the ability to produce a magnified (larger) image depending on the object’s position.

5
A convex mirror has wider field of view because
a the image formed is much smaller than the object and large number of images can be seen.
b the image formed is much closer to the mirror
c both (a) and (b)
d none of these.
Correct Answer (c) both (a) and (b) ✅
Explanation

A convex mirror curves outwards, allowing it to capture light from a wider angle. Because it forms diminished (smaller) images that appear closer to the surface of the mirror, it can fit a much larger area into a small viewing space compared to a plane mirror.

2

Case Study 2: Image Formation by Lenses

Read the passage carefully, then answer all five questions
Ch 10 · Light

The lenses forms different types of images when object placed at different locations. When a ray is incident parallel to the principal axis, then after refraction, it passes through the focus or appears to come from the focus.

When a ray goes through the optical centre of the lens, it passes without any deviation. If the object is placed between focus and optical center of the convex lens, erect and magnified image is formed.

As the object is brought closer to the convex lens from infinity to focus, the image moves away from the convex lens from focus to infinity. Also the size of image goes on increasing and the image is always real and inverted.

A concave lens always gives a virtual, erect and diminished image irrespective to the position of the object.

1
The location of image formed by a convex lens when the object is placed at infinity is
a at focus
b at 2F
c at optical center
d between F and 2F
Correct Answer (a) at focus ✅
Explanation

When an object is at infinity, the rays of light are parallel to the principal axis. After passing through a convex lens, these parallel rays converge at the principal focus (F) on the other side of the lens.

2
When the object is placed at the focus of concave lens, the image formed is
a real and smaller
b virtual and inverted
c virtual and smaller
d real and erect
Correct Answer (c) virtual and smaller ✅
Explanation

“virtual and inverted”. This is physically incorrect for a concave lens. The correct physical property is “virtual and smaller” (c).

3
The size of image formed by a convex lens when the object is placed at the focus of convex lens is
a small
b point in size
c highly magnified
d same as that of object
Correct Answer (c) highly magnified ✅
Explanation

When an object is placed exactly at the focus (F) of a convex lens, the refracted rays become parallel and never actually meet. The image is said to be formed at infinity and is highly magnified.

4
When the object is placed at 2F in front of convex lens, the location of image is
a at F
b at 2 F on the other side
c at infinity
d between F and optical center
Correct Answer (b) at 2 F on the other side ✅
Explanation

For a convex lens, if the object is placed at a distance of 2F (twice the focal length), a real, inverted image of the exact same size is formed at a distance of 2F on the opposite side of the lens.

5
At which location of object in front of concave lens, the image between focus and optical centre is formed
a anywhere between centre and infinity
b at F
c at 2F
d infinity
Correct Answer (a) anywhere between centre and infinity ✅
Explanation

For a concave lens, as long as the object is placed anywhere between the optical center and infinity, it will always produce a virtual, erect, and diminished image located between the principal focus (F) and the optical center on the same side as the object.

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