Question

a) A spectrum is obtained by emitting light from sodium vapour. Name the type of the spectrum.
b) A monochromatic light is passed through benzene. What change can be observed in the wavelength of scattered light? Write one application of this phenomenon.

Answer 1

a) A spectrum is obtained by emitting light from sodium vapour. The type of the spectrum is Line emission spectrum.
b) A monochromatic light is passed through benzene. The scattered light contains the light of smaller and larger wavelengths in addition to the wavelength of incident light. Thus, the scattered light contains different colours in addition to that of the incident light.
This phenomenon is used in the study of molecular structure.