Question

In a double-slit interference experiment, interference fringes are observed on a distant screen. The width of both slits is then doubled without changing the distance between their centers.

a. What happens to the spacing of the fringes?
b. What happens to the intensity of the bright fringes?

Answer 1

If the width of both slits in a double-slit interference experiment is doubled without changing the distance between their centers, the spacing of the fringes decreases and the intensity of the bright fringes decreases.

Step-by-step explanation:

In a double-slit interference experiment, if the width of both slits is doubled without changing the distance between their centers:

a. The spacing of the fringes will decrease.

b. The intensity of the bright fringes will decrease.

When the width of the slits is increased, the interference fringes become wider and less compact. This means that the spacing between the fringes becomes smaller. Additionally, the intensity of the bright fringes decreases because spreading out the light over a wider area results in less light reaching a specific point on the screen.

Answer 2

Answer:a)It remains the same.

b)It decreases

Explanation:◇y = (wavelength×Length)/ distance

The wavelength of light is constant.

d = distance between the two slit. The value of d does not change so the fringes as well will not change.

b) As the space between the two slit becomes wider,the diffraction of light waves will become wider too.

When the width of the two slits are doubled,the diffraction of light forms larger angles and the intensive of the bright fringes decreases.