A double-slit diffraction pattern is formed on a distant screen. If the separation between the slits decreases, what happens to
1 answer:
Answer:
Option C. The distance between interference fringes increases.
Explanation:
The distance between interference fringes for small angles can be given by the formula:
..........(1)
Where D = Distance between the slits and the screen
the wavelength of light
d = separation between the two slits
from the formula given in equation (1)
It is obvious from the relationship above that the distance between interference fringes is inversely proportional to the separation between the slits.
Therefore, if the separation between slits is increased, the distance between interference fringes is increased.
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(1)
where
n is the number of moles of the gas
R is the gas constant
T is the absolute temperature of the gas
is the ratio between the final volume and the initial volume of the gas
We need to calculate this ratio, and we can do it by using the gas pressure. In fact, for an isothermal process, Boyle's law states that the product between pressure and volume of the gas is constant:
which can be rewritten as
which is equivalent to
The problem says that the pressure of the gas is tripled, therefore the ratio between final and initial volume is:
Now we can use eq.(1) to calculate the work done by the gas. The absolute temperature is
The number of moles is n=2, therefore the work done is
And the work is negative, because it is done by the environment on the gas (the gas is compressed)
where
n is the number of moles of the gas
R is the gas constant
T is the absolute temperature of the gas
We need to calculate this ratio, and we can do it by using the gas pressure. In fact, for an isothermal process, Boyle's law states that the product between pressure and volume of the gas is constant:
which can be rewritten as
which is equivalent to
The problem says that the pressure of the gas is tripled, therefore the ratio between final and initial volume is:
Now we can use eq.(1) to calculate the work done by the gas. The absolute temperature is
The number of moles is n=2, therefore the work done is
And the work is negative, because it is done by the environment on the gas (the gas is compressed)