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IRISSAK [1]
3 years ago
13

Average wavelength of radio waves​

Physics
1 answer:
Nesterboy [21]3 years ago
7 0

Answer:

Radio waves have frequencies as high as 300 gigahertz(GHz)to as low as 30 hertz(Hz).At 300 GHz the corresponding wavelength is 1mm and at 30Hz is 10,000 km

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If the electron has half the speed needed to reach the negative plate, it will turn around and go towards the positive plate. Wh
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 v = -v₀ / 2

Explanation:

For this exercise let's use kinematics relations.

Let's use the initial conditions to find the acceleration of the electron

            v² = v₀² - 2a y

when the initial velocity is vo it reaches just the negative plate so v = 0

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now they tell us that the initial velocity is half

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          v₀ ’= v₀ / 2

at the point where turn v = 0              

          0 = v₀² /4  - 2 a y '

          v₀² /4 = 2 (v₀² / 2y)  y’

          y = 4 y'

          y ’= y / 4

We can see that when the velocity is half, advance only ¼ of the distance between the plates, now let's calculate the velocity if it leaves this position with zero velocity.

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         v² = 0 - 2 (v₀² / 2y) y / 4

         v² = -v₀² / 4

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We can see that as the system has no friction, the arrival speed is the same as the exit speed, but with the opposite direction.

7 0
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