Question 312: Wave Optics

Question

In a Young's double slit experiment, the source is white light. One of the holes is covered by a red filter and another by a blue filter. In this case

Accepted Answer

In a Young's double slit experiment where one slit is covered by a red filter and the other slit by a blue filter, the interference pattern will not form. This is because the two slits are illuminated with light of different wavelengths (red and blue), and for a meaningful interference pattern, coherent sources of the same wavelength (or nearly the same) are necessary.
Thus, the correct option is:
Option C:
there shall be no interference fringes.
Interference occurs when waves overlap and superimpose to create a pattern; however, this requires the waves to have a constant phase relationship. This condition cannot be met when using light of different colors, or wavelengths, because they will not have the necessary coherent phase relationship across the slits. Therefore, the result is no visible interference pattern of fringes on the observing screen.

Answer

there shall be alternative interference fringes of red and blue.

Answer

there shall be interference fringes for red distinct from that for blue.

Answer

there shall be no interference fringes.

Answer

there shall be interference fringes for red mixing with one for blue.

Wave Optics

In a Young's double slit experiment, the source is white light. One of the holes is covered by a red filter and another by a blue filter. In this case

Choose the correct answer: