# Reflection of Light Exe-7A Very Short Answer Concise Physics ICSE Class-9 Selina Publishers

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 sessionVisit 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

##### 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.
###### (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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