Ahelium-neon laser (λ=633nm) illuminates a diffraction grating. the distance between the two m=1 bright fringes is 35 cm on a screen 2.5 m behind the grating.

what is the spacing between slits of the grating?

Explanation:

d = Spacing between slits of the grating

= Wavelength = 633 nm

As there are two bright fringes they will equally dispose on the screen from the central point

We have the relation

Wavelength is given by

The spacing between slits of the grating is

b) returns freshwater to the earth.

c) returns freshwater to the earth.c) occurs after condensation.

d) returns freshwater to the earth.c) occurs after condensation.d) roughly equal to the amount of evaporation.

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1/0.14nm = 10^10/1.4 a lot