Index of refraction
Material Speed of Light Index of Refraction
Air 300,000,000 1.00
water 225,000,000 1.33
Diamond 124,000,000 2.42
Glass
1.50
20
IN
-
ON
I
I
ISO
TO
As light slows down, it bends or refracts. The index of refraction helps predict the amount of bending. How are the
speed of light and the index of refraction related?
The speed of light is a constant in all materials.
The index is proportional to the speed of light in the medium
The index is inversely proportional to the speed of light in the medium.
The index is proportional to the square of the speed of light in the
medium.

The relation is n = c/v where c is speed of light in a vacuumv is the speed of light in the new medium n is the refractive index of the material

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach