NCERT Class 10 Science Activity 11.3 The Human Eye and The Colourful world| The Human Eye and The Colourful world Activity 11.3 Solution
In this article, we will discuss activity
11.3 class 10 science. You will find a complete explanation with a
conclusion.
After studying this activity 11.3 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 11.3 Class 10 Science
· Place
a strong source of white light at the focus of a converging lens(L1).
This lens provides a parallel beam of light.
· Allow
the light beam to pass through a transparent glass tank(T) containing clear water.
· Allow
the beam of light to pass through a circular hole made in cardboard. Obtain a
sharp image of the circular hole on a screen (MN) using a second converging lens
(L2).
· Dissolve
about 200g of sodium thiosulphate (hypo) in about 2L of clean water taken in
the tank. Add about 1 to 2 mL of concentrated sulphuric acid to the water. What
do you observe?
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Activity 11.3 Class 10 Science Observation
and Explanation
We can see fine microscopic sulphur particles precipitate
in water in a few minutes. Light gets scattered from the minute sulphur
particles and we observe blue colour from three sides of the tank.
On form fourth side of the tank facing the hole in the cardboard, we observe transmitted light.
As the blue colour has been scattered, we observe first
the orange-red colour and then the bright crimson-red colour on the screen.
Activity 11.3 Class 10 Science Conclusion
Activity 11.3 Class 10 Science shows
that very fine particles scatter mainly blue light of smaller wavelength and
transmitted light contains larger wavelength only.
Related Topic For You
1. First activity- Activity 11.1 Class 10 Science
2. Previous activity -Activity 11.2 Class 10 Science
3. Solution of Chapter 11
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