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Murrr4er [49]
3 years ago
10

Two beams of coherent light start out at the same point in phase and travel different paths to arrive at point P. If the maximum

destructive interference is to occur at point P, the two beams must travel paths that differ by:_____
a. a whole number of half-wavelengths.
b. a whole number of wavelengths.
c. an odd number of half-wavelengths.
Physics
1 answer:
VARVARA [1.3K]3 years ago
7 0

Answer:

(B) a whole number of wavelengths.

Explanation:

Two beams of coherent light start out at the same point in phase and travel different paths to arrive at point P. If the maximum destructive interference is to occur at point P, the two beams must travel paths that differ by a whole number of wavelengths.

When the resultant effect of the combination of two identical waves result in their annihilation or complete cancellation of the effect of each other, destructive interference takes place. Hence to have two wave sources producing waves that have the same frequency wavelength and amplitude and which are always in phase with each other or have a constant phase difference are said to be Coherent source

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4 0
3 years ago
Which is not a correct way to measure wavelength?
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from rarefaction to rarefaction for a longitudinal wave
7 0
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8 0
2 years ago
Explain ALL THREE of Newton’s Laws in your own words.
Svet_ta [14]

Explanation:

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5 0
2 years ago
If, as is typical, each of them breathes about 500 cm3 of air with each breath, approximately what volume of air (in cubic meter
deff fn [24]

Answer:

<em>a) 12614.4 m^3</em>

<em>b) 28.8 m</em>

Explanation:

The complete question is

Four astronauts are in a spherical space station. (a) If, as is typical, each of them breathes about 500 cm^3 of air with each breath, approximately what volume of air (in cubic meters) do these astronauts breathe in a year? (b) What would the diameter (in meters) of the space station have to be to contain all this air?

The average breathing rate is 12 breaths per minute

there are 60 minutes x 24 hours x 365 days in a year = 525600 minutes in a year

if an average human takes 12 breath per minute, then in a year an average human take 12 x 525600 = 6307200 breath

For the four astronauts, the amount of breath = 4 x 6307200 = 25228800 breath in total.

The volume of air per breath = 500 cm^3

1 cm^3 = 10^-6 m^3

500 cm^3 = x m^3

x = 500 x 10^-6 = 5 x 10^-4 m^3

Therefore in a year, the volume of these astronauts breath in a year = 5 x 10^-4 x 25228800 = <em>12614.4 m^3</em>

b) If the space station is spherical, the volume will be given as = \frac{4}{3} \pi r^3

where r is the radius of the space station

This volume of the space station must be able to contain all the volume of breath produced by the astronauts which is = 12614.4 m^3

Equating, we have

12614.4 = \frac{4}{3} \pi r^3

12614.4 = \frac{4}{3}*3.142*r^3

12614.4 = 4.1893r^{3}

r^{3} = 12614.4/4.1893 = 3011.1

r = \sqrt[3]{3011.1} =<em> 14.4 m</em>

<em>diameter of the space station = 14.4 m x 2 =  28.8 m</em>

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3 years ago
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