Question

it physics.can anyone help me​

Answer 1

Answer:

(a) Refractive Index has not any SI Unit.

(b) A= Vacuum

(c)B is more denser

(d)C is rarer medium

(e) v = 2×10^8m/sec

(f) η = 2.5

Explanation:

(a) Refractive Index have no si units, since from the definition refractive index is the ratio of velocity of light in a material divided with velocity of light in vacuum.

(c)A medium is said to be “optically denser” medium if the light in it travels slower. If the value of the refractive index is high then, the bending effect light too will be higher. When passing from air into any medium. Any medium with a greater value of the refractive index is an optically denser medium.

(e) Refractive index of light is defined by

 η=(speed of light in veccume)/(speed of light in medium) 

η = (3×10^8)/v

1.5= (3×10^8)/v

v = (3×10^8)/1.5

v = 2×10^8m/sec

(f)

Refractive index of light is defined by

η=(speed of light in veccume)/(speed of light in medium) 

η = (3×10^8)/(1.2×10^8)

η =3/1.2

η = 2.5