Page 61 - Science Class 6 Times Publication

Activity 5.2

To show that light travels in a straight line

Materials required: A short piece of exible rubber or plastic tube,
candle and an opaque cardboard

Procedure
1. Burn a candle and
place it on a table.
2. Take a piece of opaque
cardboard paper and
make a hole on its
middle to pass a rubber
tube through it.
3. Hold the tube straight
and point one end to
the burning candle, a
source of light.
4. Observe the candle
through the hole of the
tube. What will you
observe ?
5. Now, bend the table and observe from the same end of the
table. What will you observe ?

Observation: You can see the burning candle only when the
tube is straight.

Conclusion: Light travels in a straight line.

Activity 5.3

To observe the rectilinear propagation of light

Materials required: Cardboard, cardboard stand, candle and
matchbox
Procedure

1. Take three card board sheets of same shape and size.

Times' Crucial Science and Environment 57 Book 6