What is a continuous spectrum? What is a discrete spectrum? What kind of light s

Question

What is a continuous spectrum? What is a discrete spectrum? What kind of light sources produce each type of spectrum? The wavelengths produced by a hot gas of helium (a) form a discrete spectrum (b) form a line spectrum (c) are characteristic of the electronic structure of helium (d) all of the above are true. A diffraction grating has a grating spacing of d = 1500 mm. It is used with light of wavelength 500 mm. At what angle will the first-order diffraction image be seen? Show your work. For a given wavelength and a diffraction grating of spacing d (a) an image is formed at only one angle (b) at least two orders are seen (c) the number of orders seen can be any number and depends on d and lambda (d) there can never be more than four orders seen. The grating used in laboratory (a) can produce only images in the horizontal) (b) must be rotated in its holder until it produces the desired horizontal pattern (c) produces images only one in the vertical direction (d) produces

Explanation / Answer

(1)discrete spectrum- if a physical quantity takes discrete values with positive values between one value and the next.

(2) light produced by sun or a star, produces continuous spectrum.

Characteristics set of discrete spectral lines seen in the emmision Spectra and absorbtion Spectra of related atoms of chemical element.

(3) all are true

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