Increasing the wavelength of the light increases the spacing between different fringes since the spacing between different fringes is wavelength dependent.
The spacings among different fringes decreases as the space between the slits increases because it is dependent on L. Growing the wavelength of the light will increase the spacing among unique fringes for the reason that spacing between exclusive fringes is wavelength based.
The distinction in distance traveled through the 2 waves is one complete wavelength, that is, the direction distinction is 1 λ. when the path difference is one complete wavelength, a crest meets a crest and optimistic interference happens.
They unfold aside the intense spots spread aside. So in different words, if I had been to transport these distances and the slits nearer together, you will see these vibrant spots get farther and farther faraway from each other on the screen.
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