Red light of wavelength 633 nm from a helium-neon laser passes through a slit 0.380 mm wide. the diffraction pattern is observed on a screen 3.55 m away. define the width of a bright fringe as the distance between the minima on either side.

width of maximum intensity at the center of screen is 12 mm

Explanation:

Position of minimum intensity on the screen is given as

now we know that for first position of minimum intensity on the screen we have

now we know

now we have

now total angular width of central maximum is given as

now linear width is given as

in most common fires, oxygen is needed for an oxidation reaction to takes place. the combination of oxygen with any element as fuel can create fire and combustion will occur especially if wood, light materials and other combustible things are combine with oxygen.