DAY 17 – DAW January

Fraunhofer diffraction-single slit, double slit, diffraction grating, resolving power; Diffraction by a circular aperture and the Airy pattern; Questions: Q 1. Can D1 and D2 lines of sodium light be resolved in second-order spectrum if the number of lines in the given grating is 450? Explain.   λD1=5890A0\lambda_{D1}=5890 A^0λD1​=5890A0 and  λD1=5890A0\lambda_{D1}=5890 A^0λD1​=5890A0. [10 marks] Q

DAY 17 – DAW January Read More »

DAY 15 – DAW January

Interference of light-Young’s experiment, Newton’s rings, interference by thin films, Questions: Q 1. What are Newton’s rings? How are they formed by two curved surfaces ? [10 marks] Q 2. A soap-film of refractive index 1.33 is illuminated with light of different wavelengths at an angle of 45°45\degree45°. There is complete destructive interference for λ\lambdaλ

DAY 15 – DAW January Read More »