Navigate

An interference pattern was made by using red light. If the red light

An interference pattern was made by using red light. If the red light is replaced by blue light, the fringes will becomes

Options

(a) Wider
(b) Narrower
(c) Fainter
(d) Brighter

Correct Answer:

Narrower

Explanation:

Fringe width β = λD / d

β(ʀed) / β(ʙlue) = λ(ʀed) / λ(ʙlue)

λ(ʙlue) is < λ(ʀed)

Therefore, Fringe width with blue light < β with red light.

Fringes become narrower with blue light.

BHU2001
admin:

Related Questions

  1. When two small bubbles join to form a bigger one, energy is
  2. The potential energy of a system increases if work is done
  3. A thermocouple of negligible resistance produces an e.m.f. of 40 µV/⁰C in the linear range
  4. The voltage of an a.c.supply varies with time (t) as V=120 sin 100 πt the maximum voltage
  5. Pure Si at 500 K has equal number of electron (nₑ) and hole (nₕ) concentrations