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slavikrds [6]
3 years ago
14

In a laboratory experiment, a diffraction grating produces an interference pattern on a screen. If the number of slits in (inclu

ding the slit spacing) the same, then
The fringes stay the same brightness and get closer together.
The fringes stay the same brightness and get farther apart.
The fringes stay in the same positions but get dimmer and wider.
The fringes stay in the same positions but get brighter and narrower.
The fringes get brighter, narrower, and closer together.
Physics
1 answer:
Darya [45]3 years ago
7 0

Answer:

Explanation:

When the number of slits increases, the intensity of fringes increases.

So, the fringes appear to be more bright.

As we know that the fringe width is inversely proportional to the number of slits, so as the number of slits increases, the fringe width decreases, hence the fringes are narrower, bright and close together.

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A loop of wire is carrying current of 2 A . The radius of the loop is 0.4 m. What is the magnetic field at a distance 0.09 m alo
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Answer:

B=2.91\ \mu T

Explanation:

Given that,

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We need to find the magnetic field at a distance 0.09 m along the axis and above the center of the loop. The formula for the magnetic field at some distance is given as follows :

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B=10^{-7}\times \dfrac{2\pi \times 0.4^2 \times 2}{(0.4^2+0.09^2)^{3/2}}\\\\=2.91\times 10^{-6}\ T\\\\or\\\\B=2.91\ \mu T

So, the required magnetic field is equal to 2.91\ \mu T.

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