A monochromatic beam of light of wavelength is incident on a double–slit arrangement…

PHYSICS · Multi-part · A Level · Physics · Particles and radiation · Particles and radiation

Problem

A monochromatic beam of light of wavelength

600\,\text{nm}

is incident on a double–slit arrangement having slit separation

d = 0.30\,\text{mm}

. The interference pattern is observed on a screen kept at a distance

D = 1.5\,\text{m}

from the slits. Exactly at the position of the central bright fringe a clean zinc plate (work function

\phi = 4.3\,\text{eV}

) is mounted so that the light also falls normally on the plate. (a) (i) – (b) (ii) – (c) (iii)(1) – (d) (iii)(2) – (e) (iii)(3) –