Energy is being transferred into the gas particles. Since temperature is also being increased due to the increased pressure. Temperature is a measure of the average kinetic energy of particles. Therefore energy transfers to the gas.
Larger index of refraction means slower light-speed in that material.
According to this chart, it's fastest in air and slowest in <em>diamond</em>.
By definition we know that we can calculate the frequency of an electromagnetic wave by wavelength, using the following equation:

Where:
λ is the wavelength.
c is the speed of light
f is the frequency.
Then:

So:

We know that the speed of light is:

So:


Finally, the frequency is 
The free body diagram showing the forces acting on block A is diagram 3; option C.
<h3>What are free body diagrams?</h3>
Free body diagrams are simple diagrams which are used to illustrate the magnitude and direction of the forces acting on the body.
The diagram of the crane and boxes as well as the free body diagrams are shown in the attached image.
Three forces are acting on A as follows:
- The force of gravity acting downward, represented by

- The tension in the rope 1, pulling block A upwards, represented by
The tension in the rope 2, due to the weight of block B, pulling block A downwards, represented by
Therefore, diagram 3 is correct.
In conclusion, free body diagram shows the forces acting on a body as well as their direction of action.
Learn more about free body diagrams at: brainly.com/question/25157161
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