A slit of width a is illuminated by white light. For what value of a will the first minimum for red light fall at an angle of 300 wavelength of red light is 6500 Ao
1.3 X 10-4cm
1.6 X 10-4 cm
1.1×10−31.1 \times 10^{-3}1.1×10−3 cm
1.4 X 10-4cm
(A) 1.3 X 10-4cm
Explanation:
