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

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2