Answer the following questions: a) What does a collimator do in a Grating Spectr

Question

Answer the following questions: a) What does a collimator do in a Grating Spectrometer? b) What is a line spectrum? Also provide an example of something that produces a continuous spectrum when observed in a grating spectrometer? c) What relation exists between the angle of diffraction of a light wave and its wavelength, when the lines in a diffraction grating are separated by a distance b? (Give the answer in the form of an equation.) d) The electrons that produce the visible Balmer series lines jump to n = 2 energy levels and emit photons. From which level(s) do they jump from?

Explanation / Answer

a) In a granting spectrometer - a spectrometer uses a lens or mirror to produces a collimated beam of light and disperses it with a grating  or a prism. The dispersed spectrum is then focused and viewed with an eyepiece.

b) A line spectrum is an emission spectrum consisting of separate isolated lines.

Example that produces continous spectrum is thermal emission of black body.

c) b sin(theta) = lamda

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