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3 years ago

Which statement correctly compares the speed of light

Physics

2 answers:

11111nata11111 [884]3 years ago

6 0

<u>Answer:</u> The correct answer is Option D.

<u>Explanation:</u>

Refractive index is defined as the ratio of speed of light in vacuum to the speed of light in medium. It is represented as $\eta$ . Speed of light in vacuum is always equal to $3\times 10^8m/s$

Mathematically,

$\eta=\frac{\text{Speed of light in vacuum}}{\text{Speed of light in medium}}$

If the refractive index is more, the speed of light in that medium will be slow and vice-versa.

As, the refractive index of glass is more than the refractive index of space. Hence, the speed of light will be slower in glass.

Therefore, the correct answer is Option D.

Elodia [21]3 years ago

4 0

The speed of light in glass is slower than the speed of light through space.

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3 years ago

Daffy Duck is standing 6.8 m away from Minnie Duck. The attractive gravitational force between them is 5.4x10-8 N. If Daffy Duck

artcher [175]

Answer:

432.78 Kg

Explanation:

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

Distance apart (r) = 6.8 m

Force of attraction (F) = 5.4×10¯⁸ N

Mass of Daffy Duck (M₁) = 86.5 kg

Mass of Minnie Duck (M₂) =?

NOTE: Gravitational constant (G) = 6.67×10¯¹¹ Nm²/Kg²

The mass of Minnie Duck can be obtained as follow:

F = GM₁M₂ / r²

5.4×10¯⁸ = 6.67×10¯¹¹ × 86.5 × M₂ / 6.8²

5.4×10¯⁸ = 6.67×10¯¹¹ × 86.5 × M₂ / 46.24

Cross multiply

6.67×10¯¹¹ × 86.5 × M₂ =5.4×10¯⁸ × 46.24

Divide both side by 6.67×10¯¹¹ × 86.5

M₂ = 5.4×10¯⁸ × 46.24 / 6.67×10¯¹¹ × 86.5

M₂ = 432.78 Kg

Therefore, the mass of Minnie Duck is 432.78 Kg

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3 years ago

Is the water the same temperature in alaska and mexico?

Snezhnost [94]

Colder in Alaska, warmer in Mexico.

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3 years ago

Why isn't the earth the same distance from sun all year long?

miskamm [114]

Answer:

Earth's orbit is elliptical

Explanation:

The earth's orbit is not a straight circle and the sun is not in the very center of it. The orbit is more of a wonky oval with the sun closer to one side of it than the other causing the earth's distance from the sun to vary throughout the year.

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2 years ago

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Answer:

In expanded notation the answer is 100,70 5

Explanation:

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2 years ago