A standard YDSE arrangement is shown with point source S, slit separation d, source distance a and screen distance D. Answer the following questions about wavelength, D and d.

Select all that apply

• Option A

  Larger the wavelength of light larger the fringe width.

• Option B

  The position of central maxima depends on the wavelength of light used.

• Option C

  If white light is used in YDSE, then the violet colour forms its first maxima closest to the central maxima.

• Option D

  The central maxima of all the wavelengths coincide.

Select all that apply

• Option A

  The angular fringe width does not change.

• Option B

  The fringe width changes in direct proportion.

• Option C

  The change in fringe width is same for all wavelengths.

• Option D

  The position of central maxima remains unchanged.

Select all that apply

• Option A

  The angular width does not change.

• Option B

  The fringe width changes in inverse proportion.

• Option C

  The positions of all maxima change.

• Option D

  The positions of all minima change.