Why is copper wire not used in making the filament of a bulb?

Hey there,

This is because it has very low resistance.

:)

It does not have enough resistance.

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).

i think the answer is a, hope this : )