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

An Interference Pattern Was Made By Using Red Light If Physics QuestionAn Interference Pattern Was Made By Using Red Light If Physics Question

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.

AddThis Website Tools
admin:

Related Questions

  1. A gramophone record is revolving with an angular velocity ?. A coin is placed at
  2. If a wire is stretched to four times its length, then the specific resistance
  3. A gas of monoatomic hydrogen is bombarded with a stream of electrons
  4. Magnetic flux φ (in weber) linked with a closed circuit of resistance 10 Ω varies
  5. Weight of a body of mass m decreases by 1% when it is raised to height h