Explain NCERT Class 10 Science Activity 10.9 Solution |
In this article,
we will discuss activity
10.9 class 10 science.
You will find a complete explanation with a conclusion.
After studying
this activity 10.9 Class 10 Science Light- Reflection
and Refraction, you will be able to solve Questions of Chapter 10
Light- Reflection and Refraction.
Activity 10.9 Class 10 Science NCERT
·
Draw a thick straight
line in ink, over a sheet of white paper on a table.
·
Place a glass slab over
the line in such a way that one of its edges makes an angle with the line.
·
Look at the portion of
the line under the slab from the sides. What do you observe? Does the line
under the glass slab appear to be bent at the edges?
·
Next, place the glass
slab such that it is normal to the line. What do you observe now? Does the part
of the line under the glass slab appear bent?
·
Look at the line from the
top of the glass slab. Does the part of the line beneath the slab, appear to be
raised? why does this happen?
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Observation of activity 10.9 class 10 science
Yes, the line under the slab appears to be
bent and it is due to refraction.
No, the part of the line under the glass slab does
not appear bent because the ray of light is perpendicular to the slab and does
not make any angle, so it appears straight.
Yes, the part of the line beneath the slab
appears to be raised because of refraction.
Explanation of activity 10.9 class 10 science
We draw a straight line ABCD on white
paper and place a glass slab PQRS on it such as side PQ makes an angle with line
ABCD.
When we look at ray BC placed under the slab,
the line appears to be bent. This is due to the refraction of light. Light at point B is going from air (rarer medium) to the glass slab (denser medium), so it bends towards the normal.
Light at point C is going from glass slab
to air so it bends away from the normal.
When the glass slab is placed such that
the edge PQ is normal to ABCD, the part BC under the slab does not appear to be
bent because the ray AB incident at an angle∠i=0
When we look at the line from the top of
the slab, it appears to be raised due to refraction.
Conclusion of activity 10.9 class 10 science
This activity 10.9 class 10 science demonstrates
the phenomenon of refraction and for normal incidence, there no refraction
occurs.
Related Topics for You
1. Activity 10.10 Class 10 Science
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