Page 160 - Science Class 06

Shadow : A dark patch that is formed behind an opaque object in the presence of
light infront of it
Reflection of light : Bouncing off light rays after striking an object

Incident ray : The ray which strikes an object
Reflected ray : The ray which bounces off after striking an object
Reflecting object : Objects which reflect light

Image : Illusion of an object behind a mirror or a polished surface

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i The sun and the other stars are the natural sources of light.
i Candles, matches, electric bulbs are artificial sources of light.
i Glass and water are transparent materials.
i Butter paper, milk, etc. are translucent materials.
i Wood, stone, iron, etc. are opaque materials.

i Light always travels in a straight line.
i Solar and lunar eclipses are natural phenomenon.

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A. Tick ( ) the correct op on. 3
1. Which of the following is not an ar ficial source of light?
(a) Bulb (b) Star
(c) Torch (d) Candle
2. Which of the following materials cannot cast a shadow?
(a) Glass (b) Wood
(c) Plas c (d) Water

3. Bu er paper is an example of _____________ material.
(a) transparent (b) translucent
(c) opaque (d) none of these

4. Which of the following objects causes irregular reflec on?
(a) Water (b) Book
(c) Polished metal (d) Glass
5. Solar eclipse occur when:

(a) the moon comes between the earth and the sun.
(b) the earth comes between the sun and the moon.
(c) the sun comes between the earth and the moon.

(d) none of these.

160 Science-6