Reflection of Light Exe-7A Very Short Answer Concise Physics ICSE Class-9 Selina Publishers. There is the solutions of Very short Answer type Questions of your latest textbook which is applicable in 2025-26 academic session. Visit official Website CISCE for detail information about ICSE Board Class-9.
Reflection of Light Exe-7A Very Short Answer Type
Concise Physics ICSE Class-9 Selina Publishers
| Board | ICSE |
| Class | 9 |
| Subject | Physics |
| Writer / Publication | Concise Selina Publishers |
| Chapter-7 | Reflection of Light |
| Exe-7A | Laws of Reflection |
| Topics | Solution of Exe-7(A) Very Short Answer Type |
| Academic Session | 2025-2026 |
Exercise- 7A Laws of Reflection
page -170
Very Short Answer :
Que-1: State the luminous object(s) from the following: Sun, Moon, Earth, Shooting star, Fire
Ans: Sun, Shooting star and fire are the answer.
Que-2: What do you mean by reflection of light?
Ans: The return of light into the same medium after striking a surface is called reflection.
Que-3: State which surface of a plane mirror reflects most of the light incident on it: the front smooth surface or the back silvered surface.
Ans: Black silvered surface reflects most of the light incident on it.
Que-4: A light ray is incident normally on a plane mirror.
(a) What is its angle of incidence?
(b) What is the direction of reflected ray? Show it on a diagram.
Ans: (a)- Angle of incidence is 0o.
(b)- Same as the incident ray
Que-5: For a ray reflected on a plane mirror, find the ratio pf sin i / sin r.
Ans: sin i / sin r = constant so, the ratio of sin i/sin r is 1.
Que-6: Light from a torch is reflected by a white sheet of paper and a black polished mica sheet. Which of the two will produce a strong reflected beam?
Ans: Black mica sheet produce a strongest reflected beam.
Que-7: A light ray strikes a mirror and retraces its path. What is the angle of incidence and angle of reflection?
Ans: Angle of incidence is equal to angle of reflection is 0o
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