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Doss [256]
2 years ago
5

Which are characteristics of the speed of light? Check all that apply.

Physics
2 answers:
natali 33 [55]2 years ago
7 0
The speed of light is the speed all waves travel ?
No, only the speed of all electromagnetic waves.
It's different for ocean waves, rope waves, sound waves,
guitar-string waves, slinky waves, etc.

The speed of light is the speed electromagnetic waves travel ?
Yes.  Light is one of the electromagnetic waves.

The speed of light is 3.0 x 108 m/s in space ?
Yes.  That's a good approximation, and a nice easy number
to remember. 
It's only about 0.07% faster than the real number:  2.99792458 x 10⁸ m/s .

The speed of light is the same in all matter ?
No.  It's different in every substance, and the speed in any
substance is less than the speed in space (vacuum).

The speed of higher frequency light slows down
more than
lower frequency light in matter ?
Yes, slightly.  That's why the colors spread out on the way
through a prism to make a spectrum, or on the way through
raindrops to make a rainbow.
Vesnalui [34]2 years ago
4 0

Answer:

B C and E

Explanation:

B: The speed of light is the speed electromagnetic waves travel

C: The speed of light is 3.0 x 108 m/s in space.

E: The speed of higher frequency light slows down more than lower frequency light in matter.

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Answer:

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Explanation:

The intensity of a sound wave is given by the relation

         I = P / A = ½ ρ v (2π f s_{max})²

         I = (½ ρ v 4π² s_{max}²) f²

a) with the initial condition let's call the intensity Io

        cte = (½ ρ v 4π² s_{max}²)

         I₀ = cte s² f₀²

        I₀ = cte 10 6

If frequency is increase f = 2.20 10³ Hz

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         I = cte 4.84 10⁶

let's find the relationship of the two quantities

        I / Io = 4.84

        I = 4.84 Io

        I = 4.84 0.750

        I = 3.63 W / m²

b) in this case the frequency is reduced to f = 0.250 10³ Hz and the displacement s = 4 s or

        I = cte (f s)²

        I = constant (0.250 10³ 4)²

 

        I = cte 1 10⁶

         

the relationship

        I / Io = 1

        I = Io

        I = 0.750 W / m²

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