Noodles D.
asked • 07/20/20A ray of light travels from water to ethyl alcohol. If the ray of light in the ethyl alcohol makes an angle of 48.0 degrees to the normal, what is the angle of incidence in the water? Round your answer to the nearest degree.
Arturo O. answered • 07/21/20
Experienced Physics Teacher for Physics Tutoring
Use Snell's Law.
n1 sinθ1 = n2 sinθ2
Medium 1 is water, medium 2 is ethyl alcohol, so you want to solve for θ1.
θ1 = arcsin(n2 sinθ2 / n1)
Look up the indices of refraction in water (n1) and in ethyl alcohol (n2), and you know θ2 is 48.0°. Plug in the numbers and solve for θ1.
Get a free answer to a quick problem.
Most questions answered within 4 hours.
Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.
Ken D.
5.0 (602)
Gregory I.
4.9 (168)
Geoffrey B.
5.0 (1,405)
