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Ksivusya [100]
3 years ago
14

Perspex has a greater refractive index than ice. Explain what happens to the speed and direction of a ray of light at it travels

from ice into Perspex. Thanks!
Physics
1 answer:
True [87]3 years ago
8 0

Answer:

when the ray passes from ice to perspex it must approach the normal

Explanation:

This is an exercise in refraction of light, the process is governed by the expression

      n₁ sin θ₁ = n₂ sin θ₂

where we use index 1 for the incident medium and subscript 2 for the scattered medium.

In our case, medium 1 is ice with the lowest refractive index.

           sin θ₁ = n₂ / n₁   sin θ₂

To fulfill this equation, if the ray travels through the medium 1 ice with an angle θ₁, the angle in the medium 2 perspex must be smaller so that the sine is smaller, so when the ray passes from ice to perspex it must approach the normal

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A series circuit has a capacitor of 0.25 × 10⁻⁶ F, a resistor of 5 × 10³ Ω, and an inductor of 1H. The initial charge on the cap
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Answer:

q = (3 + e^{-4000 t} - 4 e^{-1000 t})\times 10^{-6}

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Explanation:

As we know that they are in series so the voltage across all three will be sum of all individual voltages

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now we will have

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now we have

1\frac{d^2q}{dt^2} + (5 \times 10^3) \frac{dq}{dt} + \frac{q}{0.25 \times 10^{-6}} = 12

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q = 3\times 10^{-6} + c_1 e^{-4000 t} + c_2 e^{-1000 t}

at t = 0 we have

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at t = 0.01

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at t = infinity

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3 years ago
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