In the given figure, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism it produces a spectrum XY on a screen
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2
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16320
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December 8, 2019
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(a) A student suffering from myopia is not able to see distinctly the objects placed beyond 5m
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1
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1011
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April 3, 2019
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(a) Draw a ray diagram to explain the term angle of deviation
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1
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17420
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April 3, 2019
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1. Which defect of vision is Akshay suffering from? Which type of lens is used to correct this defect
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1
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1430
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April 3, 2019
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(i) defect of vision and also
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1
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1168
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April 3, 2019
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(a) What is dispersion of white light. What is the cause of such dispersion
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1
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1417
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April 3, 2019
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Why is the normal eye unable to focus on an object placed within 10 cm from the eye?
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1
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1879
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April 3, 2019
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(a) Give reason for the following: (i) Colour of the clear sky is blue
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1
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1581
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April 3, 2019
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Name the four common defects of vision and state the cause of each defect
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1
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767
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April 3, 2019
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1. Name the defect of vision he is suffering from
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1
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2315
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April 3, 2019
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1. Explain how we see different colours of an object
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1
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2292
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April 3, 2019
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State the cause of dispersion of white light passing through a glass prism
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1
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2851
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April 3, 2019
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What is meant by scattering of light?
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1
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12919
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April 3, 2019
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With the help of a labelled diagram, explain why the Sun appears reddish at the Sun-rise and the sun-set
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1
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5921
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April 3, 2019
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Why does the Sun seem to rise two minutes before the actual sunrise
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1
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2438
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April 3, 2019
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Explain giving reason why the sky appears blue to an observer from the surface of the earth?
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1
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742
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April 3, 2019
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State the difference in colour of the sun observed during sunrise/sunset and noon. Give explanation for each
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1
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1486
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April 3, 2019
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An old man cannot see objects closer than lm from the eye clearly
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1
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1295
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April 3, 2019
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Explain why the planets do not twinkle but the stars twinkle
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1
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2667
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April 3, 2019
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With the help of an activity show the blue colour of the sky and the reddish appearance of the sun at the sunrise or sunset
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0
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6579
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March 17, 2018
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What is dispersion of white light? What is the cause of dispersion? Draw a diagram to show the dispersion of white light by a glass prism
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0
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32928
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March 17, 2018
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What is myopia? State the two causes of myopia
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0
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24265
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March 17, 2018
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What is hypermetropia? Write two causes for development of this defect
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0
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8401
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March 17, 2018
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State the function of each of the following parts of the human eye:
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0
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2091
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March 17, 2018
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How are we able to see nearby and also distant objects clearly?
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0
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1834
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March 17, 2018
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A person needs a lens of power - 4.5 D for correction of her vision
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0
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3106
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March 17, 2018
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How does atmospheric refraction affect sunrise and sunset?
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0
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3875
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March 17, 2018
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Describe the formation of rainbow in the sky with the help of a diagram
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0
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4418
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March 17, 2018
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What is Tyndall effect? Explain with an example
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0
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6102
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March 17, 2018
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Why is the colour of sky blue?
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0
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1482
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March 17, 2018
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