A Diffraction Grating Has 450 Lines Per Millimeter $m$ That Contains the Entire Visible Spectrum From

question 98

Multiple Choice

A diffraction grating has 450 lines per millimeter. What is the highest order $m$ that contains the entire visible spectrum from $400 \mathrm {~nm}$ to $700 \mathrm {~nm}$ ?

• A) \(m = 2\)
• B) \(m = 3\)
• C) \(m = 5\)
• D) \(m = 4\)
• E) \(m = 6\)

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