|
Explain why do stars twinkle and planets do not?
|
|
2
|
27394
|
January 7, 2021
|
|
Conduct an experiment to find the refractive index of a prism
|
|
1
|
32322
|
February 9, 2020
|
|
Explain the formation of rainbow
|
|
0
|
75344
|
October 19, 2016
|
|
What is Tyndall effect?
|
|
1
|
6092
|
June 12, 2019
|
|
What is meant by persistence of vision?
|
|
1
|
16474
|
December 5, 2017
|
|
State the cause of dispersion, when white light enters a glass prism
|
|
2
|
11116
|
March 1, 2017
|
|
Can you guess the reason why sun does not appear red during noon hours?
|
|
0
|
1816
|
October 19, 2016
|
|
Do you know the reasons for appearance the red colour of sun during sunrise and at sunset?
|
|
0
|
1134
|
October 19, 2016
|
|
Why is that sky appears white sometimes when you view it in certain directions on hot days?
|
|
0
|
1596
|
October 19, 2016
|
|
Do you know what happens to the free atom or molecule when it is exposed to certain frequency of light?
|
|
0
|
1560
|
October 19, 2016
|
|
Is there any limit to the change of focal length of the eye lens?
|
|
0
|
1699
|
October 19, 2016
|
|
How does this change take place in eye ball?
|
|
0
|
879
|
October 19, 2016
|
|
Can you answer above question using concepts of refraction through lenses?
|
|
0
|
922
|
October 19, 2016
|
|
How do the lenses used in spectacles correct dyects of vision?
|
|
0
|
842
|
October 19, 2016
|
|
How is it possible to get the image at the same distance on the retina?
|
|
0
|
1499
|
October 19, 2016
|
|
Can you imagine the shape of rainbow when observed during travel in an airplane?
|
|
1
|
2591
|
October 19, 2016
|
|
Describe an experiment for scattering of light
|
|
0
|
7886
|
October 19, 2016
|
|
Explain two activities for the formation of artificial rainbow?
|
|
0
|
3831
|
October 19, 2016
|
|
Suggest an experiment to produce a rainbow in your classroom and explain the procedure
|
|
0
|
5302
|
October 19, 2016
|
|
Describe an activity for dispersion of light
|
|
0
|
4795
|
October 19, 2016
|
|
How can you find angle of vision?
|
|
0
|
5901
|
October 19, 2016
|
|
How do you find least distance of distinct vision?
|
|
0
|
3055
|
October 19, 2016
|
|
Why do we use lenses in spectacles to correct defects of the vision?
|
|
0
|
776
|
October 19, 2016
|
|
What happens to the image distance in the eye when we increase the distance of an object from the eye?
|
|
0
|
3669
|
October 19, 2016
|
|
When a single colour ray has been sent through a prism, does it split into more colours ? Why?
|
|
0
|
1388
|
October 19, 2016
|
|
Describe a triangular prism
|
|
0
|
868
|
October 19, 2016
|
|
Give two examples illustrating "Tyndall effect"
|
|
0
|
1630
|
October 19, 2016
|
|
Why does it take sometimes to see objects in a dim room when we enter the room from bright sunlight outside?
|
|
0
|
6516
|
October 19, 2016
|
|
"Motorist uses orange light on a foggy day rather than normal white light". Why?
|
|
0
|
3039
|
October 19, 2016
|
|
Give two more examples, which appear blue on a misty day
|
|
0
|
1256
|
October 19, 2016
|