Q
Most ordinary gases show little visible-light dispersion because the propagation speeds of different visible wavelengths are _____.
RRB Group-D
16/09/2022 / Shift-III
2022
✓ Answer:
D
Almost the same as c
For ordinary gases, visible-light speeds are close to c and differ only slightly with wavelength. Dispersion is weak, not strictly absent.
← Previous Question
Next Question →