What is the formula for calculating the speed of light in a medium?

AI Thread Summary
To calculate the speed of light in a medium, the formula used is v = c/n, where v is the speed of light in the medium, c is the speed of light in a vacuum (approximately 3 x 10^8 m/s), and n is the refractive index of the medium. For water with n = 1.33, diamond with n = 2.42, and quartz with n = 1.54, the respective speeds can be calculated using this formula. The discussion emphasizes the importance of showing work in calculations as per forum rules. Participants are encouraged to provide specific details when seeking help. Understanding the formula is crucial for accurate calculations in physics.
RoseCrye
Messages
16
Reaction score
0
1.Find the speed of light in the following in m/s...


(a) water (n = 1.33)

(b) diamond (n = 2.42)

(c) quartz (n = 1.54)

i can't seem to get any of these right...
 
Physics news on Phys.org
Please show some work. Its the rules of the forum. We're not supposed to help you until you do.
 
looking for a formula...

G01 said:
Please show some work. Its the rules of the forum. We're not supposed to help you until you do.

ooops. sorry, didn't think about that. problem was, i wasn't even sure how to do it. didn't have a formula, and i couldn't find one. that was really what i was looking for... i'll try to be more specific next time.
 
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .

Similar threads

Replies
7
Views
2K
Replies
21
Views
1K
Replies
93
Views
5K
Replies
6
Views
4K
Replies
38
Views
4K
Replies
8
Views
3K
Back
Top