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 2024-25 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 | 2024-2025 |
Exercise- 7A Laws of Reflection
page -170
Very Short Answer :
Q1- State the luminous object(s) from the following: Sun, Moon, Earth, Shooting star, Fire
Ans- Sun, Shooting star and fire are the answer.
Q2- What do you mean by reflection of light?
Ans- The return of light into the same medium after striking a surface is called reflection.
Q3- 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.
Q4- 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.
Ans (b)- Same as the incident ray
Q5- 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.
Q6- 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.
Q7- 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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