Why does laser beam might appear blue and another laser beam might appear red?

1 answer:

6 0

One thing about a laser is that the light it puts out is all one single sharp
color (wavelength) of light with no other wavelengths mixed in with it.
That wavelength is a different one for the different kinds of material
that are used to do the "lasing" ... generating the light. There are a
couple of different wavelengths of infrared lasers, and several different
types of lasers in the visible range.

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Answer:

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A portion of Nichrome wire of radius 2.50 mm is to be used in winding a heating coil. If the coil must draw a current of 9.25 A

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<h3>How to determine the length</h3>

The formula for resistance is given as;

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If we emit sounds in an open space where a large obstacle (like a mountain) is expected to return the sounds, then it will travel forth and back at a given speed for a certain time. We can assume the speed of sound is constant, so we could know the approximate distance of the mountain (or canyon in our case) by the known formula.

$x=v_st$