Page 159 - Science Class 06

Difference between a shadow and an image:

Shadow Image

1. The shadow is always black 1. Image is similar to the object in the

irrespec ve of colour. colour of the object.
2. A shadow is similar to the object in 2. The image is also similar to the shape

shape. of the object.

3. The size of the shadow depends upon 3. The size of the image of an object is
the object and distance between the similar to the object.
source of light and the object.

REGULAR AND IRREGULAR REFLECTION Regular reflec on takes place in water,

When you see your face in a mirror, your mirror and polished metals.
face appears clearly in the mirror, but when Irregular Reflec on : When the beam of
you see your face in a steel plate, your face light strikes on a smooth and polished

does not appear in it clearly. The reason surface and bounces off in indefinite
behind it is the surface of the mirror and direc on, such reflec on is called irregular
the plate. We can classify the reflec on of reflec on.
various objects into regular reflec on and

irregular reflec on.
Regular Reflec on : When the beam of light

strikes on smooth and polished surface and
bounces off in a definite direc on, such
reflec on is called regular reflec on.

Irregular reflec on takes place in books,
card boards, rocks, walls, etc.

Light : A form of energy
Transparent materials : Materials which allow light to pass through them

Translucent materials : Materials which allow a small amount of light to pass through them
Opaque materials : Materials which do not allow light to pass through them
Ray of light : The path in which light travels

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