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serious [3.7K]
4 years ago
8

An electromagnetic wave with an electric field that oscillates with a period of 8.43 ps is travelling in a vacuum. What is the w

avelength of this electromagnetic wave?
Physics
1 answer:
marysya [2.9K]4 years ago
5 0

"ps" stands for "pico-second".  It means 10⁻¹² second.

The period of this wave is 8.43 x 10⁻¹² second.

In a vacuum, the speed of any electromagnetic wave is 3 x 10⁸ m/s.

Wavelength = (speed) / (frequency)

But Frequency = 1 / period

So Wavelength = (speed) x (period)

Wavelength = (3 x 10⁸ m/s) x (8.43 x 10⁻¹² sec)

Wavelength = 2.5 x 10⁻³ meter

<em>Wavelength = 2.5 millimeters</em>

<em></em>

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Answer:

The new current in the wire is 6.3 A.

Explanation:

Given that,

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We know that, magnetic force is given by :

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\dfrac{F}{F'}=\dfrac{I}{I'}

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I'=\dfrac{IF'}{F}\\\\I'=\dfrac{2.5\times 0.058}{0.023}\\\\I'=6.3\ A

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How is a pareto chart different from a standard vertical bar​ graph?
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4 years ago
The average distance of the planet mercury from the sun is 0.39 times the average distance of the earth from the sun. How long i
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Where T_1 and T_2 are the orbital periods of Mercury and Earth respectively. We have D_1=0.39D_2 and T_2=1y. Replacing this and solving for

T_1^2=T_2^2(\frac{D_1}{D_2})^3\\T_1^2=(1y)^2(\frac{0.39D_2}{D_2})^3\\T_1^2=1y^2(0.39)^3\\T_1^2=0.059319y^2\\T_1=0.24y

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