Question

Q 5 plz urgent will mark brainliest

Answer 1

Since the relation between refractive index and velocity of light in medium is,

u1×v1=u2v2

where, v2 = c (Speed of light)

Therefore,

v1= 3 × 10^8 ÷ 1.7

= 1.76 × 10^8

Velocity of light in Ruby = 1.76 × 10^8 m/s

Answer 2

this is the answer of your question.