Fibre optic cables are capable of transmitting light at
- 2.00 x 10^8 m/s.
- 3.00 x 10^8 m/s.
- 0.99 x 10^8 m/s.
Explanation from PART66Online
Light slows in glass fibre because the core has a refractive index around 1.5, giving a speed of roughly the free-space value divided by 1.5, about 2.00 times 10 to the 8 metres per second. The full 3.00 times 10 to the 8 figure applies only to light in a vacuum, not in the fibre.
E
EgiGol asked · 15 Nov 2018
Could someone tell me where to find info about this
Community Comments (1)
G
gmess
23 Dec 2021
this is writed very bad... the answer is: 3x10^8m/s is the speed of sound on vacuum. The air has a reflective index of 1,5 ... so 3x10^8m/s /1,5 = 2x10^8 (the answer is 1.99x10^8 m/s)
Please Sign In to post a comment.
More discussions in 2. Physics
- When light rays enter a medium with a different refractive index they
- In fibre optics. The fibre cable has a refractive index of 1.5, what is its speed?
- If, with a concave mirror the object is placed beyond the centre of curvature, the image produced will be
- In a concave mirror, a light ray passing through the focal point will be reflected
- A passive sensor
- A convex mirror forms a virtual image when