Saturday, February 5, 2011

Atmospheric refraction and scattering

    

CLASS-X
HUMAN EYE AND COLOURFUL WORLD
ASSIGNMENT-2

Q1. Why do we see seven colours due to refraction by a glass prism but, not due to refraction by a glass slab?

Q2. What are the factors affecting refractive index of air?

Q3. Why do we observe the apparent random wavering or flickering of objects when seen through a turbulent stream of hot air rising above fire?

Q4. List the three phenomenon of light responsible for formation of rainbow in the sky.

Q5. Can an observer see a rainbow on the moon? Why? Why not?

Q6. List 3 situations where u can observe tyndall effect.

Q7. On a sunny day, stand at a certain distance from a fountain of water such that the position of the sun is at your back. What do you observe? Explain the reason for your observation.

Q8. Is the position of a star as seen by us its true position? Justify your answer.

Q9. Does a beam of white light give a spectrum on passing through a hollow prism?

Q10. What would have happen if there would have been no atmosphere on the Earth?

Q11. Name any 3 phenomenon based on scattering of light.

Q12. Why are the clouds generally white?

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