A diffraction pattern is obtained using a beam of red light. What happens if the red light is replaced by blue light?

Question

A diffraction pattern is obtained using a beam of red light. What happens if the red light is replaced by blue light? (A) No change (B) Diffraction bands become narrower and crowded together (C) Bands become broader and farther apart (D) Bands disappear altogether

Tardigrade Admin · Accepted Answer

Wavelength of blue light (λ text blue ) is less than wavelength of red light because width of diffraction bands is directly proportional to λ Therefore diffraction bands become narrower and crowded.

Q. A diffraction pattern is obtained using a beam of red light. What happens if the red light is replaced by blue light?

No change

Diffraction bands become narrower and crowded together

Bands become broader and farther apart

Bands disappear altogether

Wavelength of blue light $(λ_{blue})$ is less than wavelength of red light because width of diffraction bands is directly proportional to $λ$ Therefore diffraction bands become narrower and crowded.

Q. A diffraction pattern is obtained using a beam of red light. What happens if the red light is replaced by blue light?

No change

Diffraction bands become narrower and crowded together

Bands become broader and farther apart

Bands disappear altogether

Wavelength of blue light (λblue ​) is less than wavelength of red light because width of diffraction bands is directly proportional to λ Therefore diffraction bands become narrower and crowded.

Wavelength of blue light $(λ_{blue})$ is less than wavelength of red light because width of diffraction bands is directly proportional to $λ$ Therefore diffraction bands become narrower and crowded.