Answer:
The width is 
Explanation:
From the question we are told that
The width of the slit is 
The wavelength of the light is 
The position of the screen is 
Generally angle at which the first minimum of the interference pattern the light occurs is mathematically represented as
![\theta = sin ^{-1}[\frac{m \lambda}{d} ]](https://tex.z-dn.net/?f=%5Ctheta%20%20%3D%20%20sin%20%5E%7B-1%7D%5B%5Cfrac%7Bm%20%5Clambda%7D%7Bd%7D%20%5D)
Where m which is the order of the interference is 1
substituting values
![\theta = sin ^{-1}[\frac{1 *721*10^{-9}}{ 77.7*10^{-6}} ]](https://tex.z-dn.net/?f=%5Ctheta%20%20%3D%20%20sin%20%5E%7B-1%7D%5B%5Cfrac%7B1%20%2A721%2A10%5E%7B-9%7D%7D%7B%2077.7%2A10%5E%7B-6%7D%7D%20%5D)
Now the width of first minimum of the interference pattern is mathematically evaluated as
substituting values
Now the width of the pattern's central maximum is mathematically evaluated as
substituting values
Answer:
a quantity expressing the magnitude of internal friction in a fluid, as measured by the force per unit area resisting uniform flow
Explanation:
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if rebecca stands in front of david at a distance of do and david perceives the position of rebecca at di, di will be +84 cm
<h3>What is focal length ?</h3>
How strongly light converges or diverges depends on an optical system's focal length, which is the inverse of optical power. A system with a positive focus length is said to converge light, whereas one with a negative focal length is said to diverge light.
focal length = +60 cm
magnification m = -0.40
focal length being positive an magnification negative.
given lens is a convex lens.
for a lens
m = di/do and 1/f = (1/di) - (1/do)di
= -0.4do1/f = (1/-0.4do) - 1/do do
= -210 cmdi = -0.4 * -210
di = +84 cm
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All of the observations except "powerful gravitational field" are consistent with the current theory of black holes.
The gavitational field of a black hole is thought to be no different than that of an ordinary star with the same mass.
Answer:
The pulling force that should the man apply to create an upward acceleration is 141.6 N
Explanation:
Newton's second law can be stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Newton's Second law can be expressed in the following formula:
F=m*a
Where:
<em>F=</em>Force
<em>m</em>=mass
<em>a</em>= acelleration
Then, we replace given values in the formula to know the force:
