Question

1) A diffraction grating is w-3 cm wide and has N-1.2 x 104 slits. A monochromatic light source of wavelength λ-680 nm shines through the grating onto a screen. At what angle does the first-order line appear on the screen? 8-1 5.22 deg 8-1 5.78 deg θ-105.32 deg θ-59.54 deg 0 143.24 deg Submit 2) Another source of light is present and is just barely resolved from the 680 nm source in the second order. What is the difference in wavelength between this source and the original source? Αλ-0.014 nm Αλ-0.028 nm 0.042 nm 0.057 nm -1.039 nm Submit 3) If N is doubled, what happens to the minimum difference in wavelength that can be resolved for a given order? It decreases Οκ It remains the same Οκ It increases Submit

Answer 1