Practice Exercise 7.5 A ray of light passing from water to air is deviated 10° from its original direction. What is the (a) angle of incidence, (b) angle of reflection, and (c) angle of refraction?
Practice Exercise 7.5 A ray of light passing from water to air is deviated 10° from its original direction. What is the (a) angle of incidence, (b) angle of reflection, and (c) angle of refraction?
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PLEASE ANSWER PRACTICE EXCERSISE 7.5 in way of GRECA METHOD,THANKS.
Transcribed Image Text:Sample Problem 7.5
A ray of light is incident on the surface of a crown glass plate at an angle of 30° with the
normal. Determine the angle between the refracted ray and the reflected ray.
Given: 0,=30°
n crown glass
(from table 7-1)=1.52
nair=1.00
Solution:
180°-0,'– 0,. Because the angle of
Based on the figure, 0=
reflection must be equal to the angle of incidence, 0,'=30°. Using
Snell's law in solving for the angle of refraction 0,
0, ; 0!
air
n; sin 6, = n, sin 0,
(1.00) sin 30° = (1.52) sin 0,
= 19.2° 19°.
crown glass
plate
Therefore, 0=180°– 30° – 19.2°=130.8°~131°.
Practice Exercise 7.5
of light passing from water to air is deviated 10° from its original direction. What is the
A ray
(a) angle of incidence, (b) angle of reflection, and (c) angle of refraction?
210 Exploring Life Through Science-General Physics 2
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