Coherent light with lambda equals 644 n m illuminates on a double slit. The white screen is 6 cm from the slits. The two slits are spaced apart by 2,783 nm. Determine the distance on the screen between the 4th and the 2nd bright fringes above the central maximum.

2.77 cm

Explanation:

Given

Wavelength of light is

White screen is at a distance of

Distance between two slits is

Distance between two bright fringe is

So, the distance between 4 th and 2nd bright fringe is

The distance between 4 th and 2 nd brigth fringe is 2.77 cm.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

3. dark matter

empty space could also be a simple vacuum