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denis-greek [22]
3 years ago
13

Which statement describes the speed of electromagnetic waves?

Physics
2 answers:
goldfiish [28.3K]3 years ago
7 0

Answer:

Their speed in a vacuum is a constant value.

Explanation:

Electromagnetic waves consits of oscillations of electric field and magnetic field. The oscillations of these fields occur in a direction perpendicular to the direction of propagation of the waves, so they are transverse wave. Electromagnetic waves, contrary to mechanical waves, do not need a medium to propagate, so they can also travel through a vacuum. In a vacuum, their speed is constant and has always the same value, the speed of light:

c=3\cdot 10^8 m/s

Marianna [84]3 years ago
3 0

Answer:

Their speed in a vacuum is a constant value.

Explanation:

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In your research lab, a very thin, flat piece of glass with refractive index 1.50 and uniform thickness covers the opening of a
lara31 [8.8K]

Answer:

The longest wavelength in vacuum for which there is constructive interference for the reflected light, λ   = 3472.

Explanation:

Refractive index of Glass (given) = 1.5

For the case of a constructive interference,

2nt = (m + 1/2) λ

For case 1,

2nt = (m + 1/2) 496 nm

For case 2,

2nt = (m +1+ 1/2) 386 nm

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Inserting the value of m in 1.

2nt = (m + 1/2) 496 nm

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t = ((3 + 1/2) * 496 nm)/ 3

t = 578.6 nm

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b)

It is generally known that for constructive interference,

2nt = (m + 1/2) λ

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3 0
3 years ago
What is meant by "steam distillation"? choose the correct option from below.
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Answer:

b is the correct option.

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GaryK [48]

Answer:

Startinfg speed is 13.82 m/s

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