26. -/1 points SPreCalc7 7.4.057 My Notes Ask Your Teacher It has been observed

Question

26. -/1 points SPreCalc7 7.4.057 My Notes Ask Your Teacher It has been observed since ancient times that light refracts or "bends as it travels from one medium to another (from air to water, for example). If v1 is the speed of light in one medium and v2 its speed in another medium, then according to Snell's Law sin() i sin(2) v2 | where 6, is the angle of incidence and 2 is the angle of refraction (see the ngure). The number v/v2 is called the index of refraction. The index of refraction for several substances is given in the table Refraction from aitr to substance 8,1 Air Substance Water Alcohol Glass Diamond 1.33 1.36 1.52 2.41 Water 19 If a ray of light passes through the surface of a lake at an angle of incidence of 55°, what is the angle of refraction? (Round your answer to two decimal places.) Need Help?RWatch Read it

Explanation / Answer

sin(theta1)/sin(theta2)= v1/v2

sin55/sin theta2= 1.33

sin theta2=sin55/1.33

theta 2=38.03°

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