Explain why do stars twinkle and planets do not?
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2
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27020
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January 7, 2021
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Conduct an experiment to find the refractive index of a prism
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1
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31322
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February 9, 2020
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Explain the formation of rainbow
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0
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75154
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October 19, 2016
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What is Tyndall effect?
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1
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6052
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June 12, 2019
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What is meant by persistence of vision?
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1
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16425
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December 5, 2017
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State the cause of dispersion, when white light enters a glass prism
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2
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11065
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March 1, 2017
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Can you guess the reason why sun does not appear red during noon hours?
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0
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1806
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October 19, 2016
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Do you know the reasons for appearance the red colour of sun during sunrise and at sunset?
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0
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1114
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October 19, 2016
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Why is that sky appears white sometimes when you view it in certain directions on hot days?
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0
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1574
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October 19, 2016
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Do you know what happens to the free atom or molecule when it is exposed to certain frequency of light?
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0
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1536
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October 19, 2016
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Is there any limit to the change of focal length of the eye lens?
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0
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1686
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October 19, 2016
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How does this change take place in eye ball?
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0
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872
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October 19, 2016
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Can you answer above question using concepts of refraction through lenses?
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0
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909
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October 19, 2016
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How do the lenses used in spectacles correct dyects of vision?
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0
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830
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October 19, 2016
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How is it possible to get the image at the same distance on the retina?
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0
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1488
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October 19, 2016
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Can you imagine the shape of rainbow when observed during travel in an airplane?
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1
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2573
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October 19, 2016
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Describe an experiment for scattering of light
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0
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7867
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October 19, 2016
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Explain two activities for the formation of artificial rainbow?
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0
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3784
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October 19, 2016
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Suggest an experiment to produce a rainbow in your classroom and explain the procedure
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0
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5182
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October 19, 2016
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Describe an activity for dispersion of light
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0
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4766
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October 19, 2016
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How can you find angle of vision?
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0
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5840
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October 19, 2016
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How do you find least distance of distinct vision?
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0
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3034
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October 19, 2016
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Why do we use lenses in spectacles to correct defects of the vision?
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0
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764
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October 19, 2016
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What happens to the image distance in the eye when we increase the distance of an object from the eye?
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0
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3655
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October 19, 2016
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When a single colour ray has been sent through a prism, does it split into more colours ? Why?
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0
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1369
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October 19, 2016
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Describe a triangular prism
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0
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858
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October 19, 2016
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Give two examples illustrating "Tyndall effect"
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0
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1617
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October 19, 2016
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Why does it take sometimes to see objects in a dim room when we enter the room from bright sunlight outside?
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0
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6505
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October 19, 2016
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"Motorist uses orange light on a foggy day rather than normal white light". Why?
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0
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3018
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October 19, 2016
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Give two more examples, which appear blue on a misty day
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0
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1221
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October 19, 2016
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