Alayer of oil (n = 1.45) floats on an unknown liquid. a ray of light originates in the oil and passes into the unknown liquid. the angle of incidence is 65.3 degrees, and the angle of refraction is 64.8 degrees. what is the index of refraction of the unknown liquid?

1.46

Explanation:

Refractive index of oil = n =1.45

Let  unknown liquid's refractive index be n'  

According to Snell's law, n sin i = n' sin r

Angle of incidence = i = 65.3

Angle of refraction = r = 64.8

1.45 sin 65.3 = n' sin 64.8

⇒ n' = 1.45 sin 65.3 / sin 64.8

        =  1.46

neither accurate nor precise.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force