Question

Two 20 cm long thin pieces of glass make a wedge that is 9 micro meters at its widest. The space between the glass is filled with oil of index of refraction 1.4. Laser of wavelength 532nm is used

a) When viewed in transmission, what is the distance between the corner and the m = 8 maximum? (for clarification, m refers to to the m in this formula: 2tn = (m + 0.5)*lambda

b) What is the distance between two consecutive bright fringes viewed in reflection?

c) What are you likely to see at the corner in transmission, a bright or dark fringe? Why?

d) How many bright fringes do you see if the wedge were to float on a liquid of n = 1.45?

Answer 1