diffraction

Question 1

if only 2 colours through double slit then (e.g. red green)

Answer 1

• central max is mix red and green
• green band closest to centre
• red and green fringes seen on either side

Question 2

if 2 wavelengths green (lander) and red (1.2 lander) allowed through double slit affect on fringe spacing

Answer 2

red fringe spacing 20% larger than green

Question 3

for refraction don’t say density say

Answer 3

optical density