Light of wavelength 633 nm from a distant source is incident on a slit 0.750 mm wide, and the resulting diffraction pattern is observed on a screen 3.50 m away. what is the distance between the two dark fringes on either side of the central bright fringe?

y=5.908 mm

Explanation:

Given data

wavelength (λ)= 633nm

d(distant source is incident on a slit)=0.750mm

D(diffraction pattern is observed on a screen)=3.50 m

To find

y(What is the distance between the two dark fringes on either side)=?

Solution

For a dark fringe to form

dy/D=λ

so

y=(Dλ)/deq(1)

Put values of D,λ and d in eq(1) we get

y={3.50×(633×10⁻⁹)}/(0.750×10⁻³)

y=2.954mm

So the total distance between dark fringes on either side is 2×y

so final distance is

y=5.908 mm

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =