A light spectrum is formed on a screen using a diffraction grating.The entire apparatus (source, grating and screen)is now immersed in a liquid of index 1.33.As a result, the pattern on the screen:
A)remains the same
B)spreads out
C)crowds together
D)becomes reversed, with the previously blue end becoming red
E)disappears because the index isn't an integer

Question

Quizplus · Accepted Answer

When the apparatus is immersed in a liquid with a refractive index greater than 1, the wavelength of the light in the medium decreases (since wavelength in medium = wavelength in vacuum / refractive index). This causes the diffraction pattern to crowd together because the angles of diffraction decrease.

A Light Spectrum Is Formed on a Screen Using a Diffraction