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Mademuasel [1]
3 years ago
14

A beam of unpolarized light in air strikes a flat piece of glass at an angle of incidence of 54.2 degrees. If the reflected beam

is completely polarized, what is the index of refraction of the glass?
A. 1.60
B. 1.39
C. 1.52
D. 2.48
Physics
2 answers:
Stels [109]3 years ago
6 0

Answer:

correct option is B. 1.39

Explanation:

given data

angle of incidence (θ) = 54.2 degrees

to find out

index of refraction of the glass

solution

we know that here reflected beam is completely polarized

so angle of incidence = angle of polarized    ....................1

for reflective index we apply here Brewster law that is

μ = tan(θ)     ...............2

put here θ value we get

μ = tan(54.2)

μ = 1.386

so correct option is B. 1.39

marishachu [46]3 years ago
5 0

Answer:

1.386

Explanation:

Angle of incidence, i = 54.2°

Let n be the refractive index of glass.

According to the Brewster's law

n = tan ip

where, ip is the polarising angle.

n = tan 54.2°

n = 1.386

Thus, the refractive index of glass is 1.386.

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If two micro coulomb of charge is flowing in a circuit for 5 minutes. What is the amount of current in the circuit?
Murrr4er [49]

Answer:

6.67×10¯⁹ A

Explanation:

From the question given above, the following data were obtained:

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Time (t) = 5 mins

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Next, we shall convert 2 μC to C. This can be obtained as follow:

1 μC = 1×10¯⁶ C

Therefore,

2 μC = 2 μC × 1×10¯⁶ C / 1 μC

2 μC = 2×10¯⁶ C

Next, we shall convert 5 mins to seconds. This can be obtained as follow:

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Therefore,

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Finally, we shall determine the current in the circuit. This can be obtained as follow:

Quantity of electricity (Q) = 2×10¯⁶ C

Time (t) = 300 s

Current (I) =?

Q = It

2×10¯⁶ = I × 300

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I = 2×10¯⁶ / 300

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