<em><u>Given</u></em>:
- If the charge of +7 mC is placed at the centre of two concentric spheres with the radius 2.0cm and 4.0cm respectively
<em><u>Need to find</u></em> :
- Ratio of the flux through them will be ?
<em><u>Calculation</u></em>:
<em><u>Gauss law</u></em> :- ø = q/Eₒ
1. For small sphere:- ø1 = q/Eₒ
2. For large sphere :- ø2 = q/Eₒ
=> ø1/ø2 = (q/Eₒ)/(q/Eₒ)
=> ø1/ø2 = 1/1
Ratio of flux is 1:1
Answer:
The speed of the light ray is halved
Explanation:
The index of refraction of a medium is the ratio between the speed of light in a vacuum (c) and the speed of light in the medium (v):
For medium X, we have
(1)
For medium Y, we have
(2)
Dividing (1) by (2), we find
(3)
In this problem, the index of refraction of medium Y is twice as great as the index of refraction of medium X:
Substituting this into eq.(3), we get
So, as a light ray travels from medium X into medium Y, the speed of the light ray is halved.
C good luck ok good luck with