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3 years ago

A cellular telephone transmits electromagnetic waves at a frequency of 835 mhz. what is the wavelength of these waves?

1 answer:

4 0

HI!

instead of just giving you the answer, i will help you to understand it in simple terms.

As electromagnetic waves (read: light) move forwards it 'vibrates' up and down. The frequency of light tells us how many up-down vibrations it makes each second (1hz = 1 up-down vibration per second & 1mhz = 1 million up-down vibrations per second). Each individual vibration is called one wave.

Since we also know how many meters light travels in 1 second (290,000,000 meters), we can easily see that (in the case of this specific question) every '290,000,000' meters, there are '835,000,000' vibrations or waves.

It's then just a simple division to work out what is the length of just one wave! - which is what we call the wavelength of light at that frequency.

290,000,000 / 835,000,000 = 0.34m (or 34cm)

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Explain in your own words the interaction between the electric and magnetic fields that make up a light wave.

iVinArrow [24]

Answer:

They oscillates perpendicularly to one another, the oscillation of one field generates the other field.

Explanation:

In a light wave, an oscillating electric field of a light wave produces a magnetic field, and the magnetic field also oscillates to produce an electric field. The magnetic field and the electric field of a light wave both oscillates perpendicularly to one another. The resultant energy and direction of the wave generated as a result of these oscillating fields is propagated perpendicularly to both fields.

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3 years ago

agasfer [191]

The distance between the plates is 7.1 * 10^-7 m

<h3>What is the distance?</h3>

The capacitor is a device that is used to store charges. The capacitor always has a dielectric that is placed between the capacitors that separates them.

Given that;

C = εoA/d

C = capacitance

εo = permittivity of free space

A = cross sectional area

d = distance apart

Cd = εoA

d = εoA/C

d = 8.8 * 10^-12 * 8.89 * 10^-4/1.11 * 10^-8

d = 7.1 * 10^-7 m

Learn more about capacitor:brainly.com/question/17176550

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2 years ago

A student throws a set of keys vertically upward to his fraternity brother, who is in a window 3.60 m above. The brother's outst

Contact [7]

Answer:

$v_{i}=10.10 m/s$

Explanation:

The equation of the position is:

$y=y_{i}+v_{i}t-0.5gt^{2}$

Where:

v(i) is the initial velocity

The initial position y(i) will be zero and the final position y = 3.60 m.

So, we just need to solve this equation for v(i).

$v_{i}=\frac{y+0.5gt^{2}}{t}$

$v_{i}=\frac{3.6+0.5*9.81*1.6^{2}}{1.6}$

$v_{i}=10.10 m/s$

Therefore, the initial velocity is 10.10 m/s upwards.

I hope it helps you!

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3 years ago

A static electric charge can be released as __________. *

poizon [28]

A, a spark because if you touch something after rubbing your hand on carpet or something you get a spark

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3 years ago

Read 2 more answers

• 2. particles penetrate through paper.

AleksandrR [38]

Answer: The penetrating power of alpha rays, beta rays, and gamma rays varies greatly. Alpha particles can be blocked by a few pieces of paper. Beta particles pass through paper and Gamma rays are the most difficult to stop and require concrete, lead, or other heavy shielding to block them.

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3 years ago