A Laser Shines 630-Nm Light Through a Grating Producing a First-Order

question 80

Multiple Choice

A laser shines 630-nm light through a grating producing a first-order (m = 1) maximum at an angle of 30°.A second laser produces a first-order maximum with the same grating at 20°.What is the wavelength emitted by the second laser?

• A)945 nm
• B)651 nm
• C)420 nm
• D)431 nm

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