|
Explain why do stars twinkle and planets do not?
|
|
2
|
27328
|
January 7, 2021
|
|
Conduct an experiment to find the refractive index of a prism
|
|
1
|
32208
|
February 9, 2020
|
|
Explain the formation of rainbow
|
|
0
|
75310
|
October 19, 2016
|
|
What is Tyndall effect?
|
|
1
|
6088
|
June 12, 2019
|
|
What is meant by persistence of vision?
|
|
1
|
16462
|
December 5, 2017
|
|
State the cause of dispersion, when white light enters a glass prism
|
|
2
|
11098
|
March 1, 2017
|
|
Can you guess the reason why sun does not appear red during noon hours?
|
|
0
|
1815
|
October 19, 2016
|
|
Do you know the reasons for appearance the red colour of sun during sunrise and at sunset?
|
|
0
|
1132
|
October 19, 2016
|
|
Why is that sky appears white sometimes when you view it in certain directions on hot days?
|
|
0
|
1594
|
October 19, 2016
|
|
Do you know what happens to the free atom or molecule when it is exposed to certain frequency of light?
|
|
0
|
1556
|
October 19, 2016
|
|
Is there any limit to the change of focal length of the eye lens?
|
|
0
|
1697
|
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
|
920
|
October 19, 2016
|
|
How do the lenses used in spectacles correct dyects of vision?
|
|
0
|
841
|
October 19, 2016
|
|
How is it possible to get the image at the same distance on the retina?
|
|
0
|
1497
|
October 19, 2016
|
|
Can you imagine the shape of rainbow when observed during travel in an airplane?
|
|
1
|
2587
|
October 19, 2016
|
|
Describe an experiment for scattering of light
|
|
0
|
7885
|
October 19, 2016
|
|
Explain two activities for the formation of artificial rainbow?
|
|
0
|
3822
|
October 19, 2016
|
|
Suggest an experiment to produce a rainbow in your classroom and explain the procedure
|
|
0
|
5286
|
October 19, 2016
|
|
Describe an activity for dispersion of light
|
|
0
|
4790
|
October 19, 2016
|
|
How can you find angle of vision?
|
|
0
|
5886
|
October 19, 2016
|
|
How do you find least distance of distinct vision?
|
|
0
|
3050
|
October 19, 2016
|
|
Why do we use lenses in spectacles to correct defects of the vision?
|
|
0
|
771
|
October 19, 2016
|
|
What happens to the image distance in the eye when we increase the distance of an object from the eye?
|
|
0
|
3668
|
October 19, 2016
|
|
When a single colour ray has been sent through a prism, does it split into more colours ? Why?
|
|
0
|
1385
|
October 19, 2016
|
|
Describe a triangular prism
|
|
0
|
868
|
October 19, 2016
|
|
Give two examples illustrating "Tyndall effect"
|
|
0
|
1629
|
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
|
6514
|
October 19, 2016
|
|
"Motorist uses orange light on a foggy day rather than normal white light". Why?
|
|
0
|
3035
|
October 19, 2016
|
|
Give two more examples, which appear blue on a misty day
|
|
0
|
1253
|
October 19, 2016
|