Evaluate each of the following as true or false? true false White light is monoc

Question

Evaluate each of the following as true or false?

true false  White light is monochromatic.
true false  A phase difference of 360 degrees is the same as a path difference of one wavelength.
true false  Destructive interference occurs when two waves overlap with the same phase.
true false  Monochromatic light has one frequency.
true false  The reflected component of light traveling from one medium into another of higher refractive index will not under go a phase change relative to the incoming light.

Explanation / Answer

1. False

Well the monochromatic light only has one type of wavelength therefore will only diffract the one colour. The monochromatic light is much more intense as it diffracts only one type of wavelength whereas the white is much less intense due to the various wavelengths it is combined of diffracting differently.

2. True

X=. / 2

Here, X is path difference, is phase difference.

when = 360 degrees = 2

X=

3. False

Destructive interference occurs when the maxima of two waves are 180 degrees out of phase: a positive displacement of one wave is cancelled exactly by a negative displacement of the other wave. The amplitude of the resulting wave is zero.

4. True

Well the monochromatic light only has one type of wavelength and frequency.

5. True

Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated

When light reflects off a material denser (with higher refractive index) than the external medium, it undergoes a polarity inversion. In contrast, a less dense, lower refractive index material will reflect light in phase

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