NCERT Class 10 Science Activity 11.1 The Human Eye and The Colourful world| The Human Eye and The Colourful world Activity 11.1 Solution
In this article, we will discuss activity
11.1 class 10 science. You will find a complete explanation with a
conclusion.
After studying this activity 11.1 Class 10
Science The Human Eye and The Colourful World, you will be able to solve
Questions of Chapter 11 The Human Eye and The Colourful world.
Activity 11.1 Class 10 Science
· Fix
a sheet of white paper on a drawing board using drawing pins.
· place
a glass prism on it in such a way that it rests on its triangular base. Trace
the outline on the prism using a pencil.
· Draw
a straight-line PE inclined to one of the refracting surfaces, say AB of the
prism.
· Fix
two pins say at points P and Q on the line PE.
· Look
for the images of the pins fixed at P and Q through the other face AC.
· Fix
two more pins, at points R and S, such that the pins at R and S the images of
the pins at P and Q lie on the same straight line.
· Remove
the pins and the glass prism.
· The
line PE meets the boundary of the prism at point E. similarly join and produce
the points R and S. let these lines meet the boundary of the prism at E and F, respectively,
join E and F.
· Draw
perpendicular to the refracting surfaces AB and AC of the prism at points E and
F respectively.
· Mark
the angle of incidence (∠i), the angle of refraction(∠r), and the angle of emergence(∠e), .webp "NCERT Class 10 Science Activity 11.1 The Human Eye and The Colourful world")
Observation & Explanation Activity 11.1
Class 10 Science
The first refraction occurs at the surface XY. The incident
ray fall on the surface XY means the ray is going from a rarer medium (air) to a denser(glass prism) medium at point E
The refracted ray EF incident at surface YZ at point F and emerges along FS
bending away from normal MM’ on face YZ means ray is going from denser
to rarer medium.
At first refracting surface XY, the angle of refraction(∠r ) is smaller than the angle
of incidence but at the second refracting surface YZ, the angle of emergence (∠e) is larger than the
angle of incidence.
Conclusion
Due to the peculiar shape of the prism, the net deviation in
passing through the prism is never zero. The deviation suffered by the ray is ∠D, this is called the angle
of deviation.
Related Topic for you
1. Next activity - Activity 11.2 Class 10 Science
2. NCERT Solutions of Chapter 11
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