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Light — PHYSICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9PHYSICSLight3 Marks
Question
(i) Parallel rays are incident:
1. on regular surface and
2. on irregular surface. In what respect do reflected rays in (1) differ from those of (2)?
(ii) Write down four characteristics of image formed in a plane mirror.
✓

Answer

(i) Parallel rays of light after reflection from a regular surface. goes in a particular direction while after reflection from irregular surface go in different directions.
(ii) Characteristics of Image formed by a Plane Mirror.
(a) Image is of the same size as that of object.
(b) Image is laterally inverted.
(c) It is upright.
(d) It is virtual.
(e) Image formed is as far behind the mirror as the object in front of the mirror.

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