A ray in plastic has a critical angle of 44.4 deg when trying to enter air. What is the index of refraction for the plastic?
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Ответ:
1.43
Explanation:
Given that:
C (critical angle) = 44.4°
n (refractive index of plastic) = ?
Apply the formula n = 1/sineC, the index of refraction for the plastic can be obtained by:
n = 1/sineC
n = 1/sine 44.4°
n = (1/0.6996)
n = 1.43
Thus, the index of refraction for the plastic is 1.43
Ответ:
D) Weed whacker full of grass
Explanation: Its D) because the weed wacker full of grass is stil and not moving therefore making it potential energy.