ILL MARK BRAINLIEST PLS HELP 4. A student performs Young's double-slit experiment using a slit separation of 21.6 um. A
screen is placed 2.50 m from the centre of the sources such that a point on the fifth
nodal line is 37.5 cm from the centre of the interference pattern. Find the wavelength of
the light used and identify its colour.

which corresponds to red color

Explanation:

Recall that the formula for the maximum condition of interference when light of wave length , for slit separation d, screen distance D, displacement from the center line y, and order m is given by:

So in our case, d = 21.6 micrometers, D = 2.5 m, y = 0.375 m, m = 5, and is the unknown we solve for:

And this wavelength corresponds to the red color (between about 625 nm and 740 nm)

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000