Question

Imagine a light ray traveling from a vacuum (medium 1) into another medium containing an unknown substance (medium 2). When the light hits the interface between the two media, the initial angle of incidence is 40 degrees (measured from a line perpendicular to the boundary surface), and it is then refracted by an angle of 29 degrees (again, measured relative to a line perpendicular to the boundary surface).

1. What is the speed of light (in units of meters per second) in medium 2?
2. From a google search, identify the substance within medium 2. Explain your reasoning and cite your source.

Answer 1

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Interface - and ray Uning snell's law, incident Denpenticular MehumL 1 u = singi - 1 V2 Sinoor nah Medium 1 Refracted Where We are speed of eight in Ist and and medium respectively h, and n are refractive indices in Ist and and medium respectively. di and or are angle of incidence and refraction respectively. Thus, Here, medium t is vaccum - We know, speed of eight in vacum=3x108 mag

Angie of incidence, Oi = 400 for medium2 speed of light, V. = ? angle of refraction, or $2go So, using Snell's law, - Sindi = 3x208 - Sinho) I Sing 2 Sin(290) on V₂ = 3x Lo8 × Sin lago, Singoo, Now - 222.26 *108 mis [Answer past a] for material of medium refractive index of medium, il vacium n=1 using Shell's law, RE Sindi = 12 Sinar h =) Sin 400) = 12 Sin(290) Le = n₂ = 1.33 i.e. refractive interne - of and medium. And from text book or google search it can easily be found that material with refractive indone +33 is water. (Answer