Class 10 • Physics • Chapter 9
Light - Reflection and Refraction
True & False Quiz
Reflect. Refract. Focus.
✓True
✗False
25
Questions
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Ch.9
Chapter
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X
Class
Why True & False for Light - Reflection and Refraction?
How this format sharpens your conceptual clarity
🔵 Light optics forms the foundation of lenses, mirrors, cameras, telescopes, and the human eye — one of the highest-scoring Class X chapters.
✅ T/F tests mirror formula, lens formula, sign conventions, nature of images, and Snell's law of refraction.
🎯 Concave mirror can form both real AND virtual images depending on object position — a very common T/F trap.
📋
Read each statement carefully. Click True or False — instant feedback with explanation appears. Submit anytime; unattempted questions are marked Skipped.
Q 1
A concave mirror can form a real and inverted image.
Q 2
The focal length of a convex mirror is negative.
Q 3
The center of curvature of a mirror lies on the reflecting surface.
Q 4
The image formed by a convex mirror is always virtual and diminished.
Q 5
A real image can be obtained on a screen.
Q 6
The radius of curvature of a mirror is twice its focal length.
Q 7
The image formed by a plane mirror is always real.
Q 8
Laws of reflection are valid only for plane mirrors.
Q 9
The angle of incidence is equal to the angle of reflection.
Q 10
The refractive index of water is more than that of glass.
Q 11
In refraction, the speed of light increases when it enters from a denser to a rarer medium.
Q 12
The incident ray, the reflected ray, and the normal all lie in the same plane.
Q 13
When light enters a denser medium from a rarer medium, it bends away from the normal.
Q 14
The image formed by a concave mirror for an object placed at the center of curvature is of the same size as the object.
Q 15
Refraction occurs because light changes its speed when it passes from one medium to another.
Q 16
The image formed by a convex mirror can be larger than the object.
Q 17
Total internal reflection can occur when light passes from water to air.
Q 18
Light always travels in a straight line.
Q 19
Virtual images cannot be captured on a screen.
Q 20
The mirror formula relates object distance, image distance, and focal length for spherical mirrors.
Q 21
Refraction does not change the color of light.
Q 22
Parallel rays after reflection from a convex mirror appear to diverge from its principal focus.
Q 23
The power of a lens is measured in diopters.
Q 24
When the object is at infinity, a concave mirror forms the image at the principal focus.
Q 25
The human eye uses refraction of light to form images.
Key Takeaways — Light - Reflection and Refraction
Core facts for CBSE Boards & exams
1
Mirror formula: 1/v + 1/u = 1/f; Magnification m = −v/u.
2
Lens formula: 1/v − 1/u = 1/f; Magnification m = v/u.
3
New Cartesian: distances measured from pole/optical centre; distances in direction of incident light are positive.
4
Concave mirror: converging; convex mirror: diverging (always virtual, erect, diminished).
5
Refractive index n = speed of light in vacuum / speed in medium = sin i / sin r (Snell's law).
6
Power of lens P = 1/f (in metres), unit = dioptre (D); convex = positive P, concave = negative P.