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Light
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Light Travels along a Straight Line
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Light Travels in a Straight Line
Light Travels in a Straight Line
4 Mins
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REVISE WITH CONCEPTS
Light Travels in Straight Line
Example
Definitions
Formulaes
>
Rectilinear Propagation of Light.
Example
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Formulaes
>
Light Preliminaries
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QUICK SUMMARY WITH STORIES
Rectilinear Propagation Of Light
3 mins
How we See Things
2 mins
A Ray and Beam of Light
3 mins
Regular and Irregular Reflection
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Important Questions
Explain an experiment to show the rectilinear propagation of
light
.
Hard
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>
A candle can not be seen through a bent pipe. This shows that
Medium
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>
We can see a non-luminous object when light :
Medium
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>
The path of light is
Medium
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>
Four students
A
,
B
,
C
and
D
looked through pipes of different shapes to see a candle flame as shown in Fig.
Who will be able to see the candle flame clearly?
Medium
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>
Describe an experiment to show that light travels in a straight line path.
Hard
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>
Rajesh conducts the following experiment.
He cuts
3
cardboard pieces, each with a hole in the center, and aligns them in a straight line as shown in the image. He now puts a candle in front of the first cardboard piece and looks at it from behind the third piece. He is able to see the candle. He puts the third cardboard piece aside and now tries to look at the candle. But this time, he is not able to see it.
What can be concluded from this experiment?
Medium
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>
Which property of light is known as rectilinear propagation of light?
Easy
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>
What do we need in order to see a shadow?
Medium
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>
We can see the objects only when:
Medium
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>