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Helga [31]
2 years ago
7

Maurice directs a beam of light on a sheet of glass at an angle of 51°. What is the angle of refraction in the glass? The refrac

tive index of glass is 1.46.
A: 22 degrees
B: 29 degrees
C: 32 degrees
D: 36 degrees
Physics
2 answers:
alexgriva [62]2 years ago
5 0

Answer:

Angle of refraction in the glass is 32 degrees

Explanation:

It is given that,

Maurice directs a beam of light on a sheet of glass at an angle, θ₁ = 51°

The refractive index of the glass is, n₂ = 1.46

We know that the refractive index of the air is, n₁ = 1

We have to find angle of refraction in glass i.e. θ₂

According to Snell's law :

\dfrac{n_1}{n_2}=\dfrac{sin\ \theta_2}{sin\ \theta_1}

Putting all the values we get :

\dfrac{1}{1.46}=\dfrac{sin\ \theta_2}{sin51}  

\theta_2=sin^{-1}(\dfrac{sin(51)}{1.46})

\theta_2=32\ ^0

Hence, the correct option is (c) " 32 degrees ".  

iVinArrow [24]2 years ago
4 0
Maurice directs a beam of light on a sheet of glass at an angle of 51°. The refractive index of glass is <span>1.46. </span>The angle of refraction in the glass is 29 degrees. The answer is letter B.
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<h3>Further explanation</h3>

Given

vo=initial velocity=0(from rest)

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t₃= 30 s

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\tt d=vo.t+\dfrac{1}{2}at^2\\\\d=\dfrac{1}{2}\times 1\times 20^2\rightarrow vo=0\\\\d=200~m

\tt vt=vo+at\\\\vt=at\rightarrow vo=0\\\\vt=1\times 20\\\\vt=20~m/s

State 2 : constant speed

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\tt d=vot+\dfrac{1}{2}at^2\\\\d=20.30-\dfrac{1}{2}.\dfrac{2}{3}.30^2\\\\d=300~m

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\tt avg~velocity=\dfrac{36500}{20~s+1800~s+30~s}=19.73~m/s

4 0
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