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Physics

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Diffraction grating #1 has half the lines/cm that diffraction grating #2 does. When used with a certain wavelength of light, both gratings give first order maxima. Which of the following statements is true for the same wavelength of light.

  • Physics -

    Grating #2 must give a second order maximum.

    Both gratings must also give second order maxima.

    It is possible that neither grating gives a second order maximum.

    Grating #1 must give a second order maximum.

  • Physics -

    Grating #1, which has less dispersion, will have a second order maximum where grating # 2 has its first order maximum.

    Choose the last answer.

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