Which of the Following Lasers Emits Photons with the Lowest $\lambda$

question 86

Multiple Choice

Which of the following lasers emits photons with the lowest energy?

• A)a Nd:YAG laser with \(\lambda\) = 1064 nm
• B)an Ar⁺ laser with \(\lambda\) = 514.5 nm
• C)a Kr⁺ laser with \(\lambda\) = 647 nm
• D)an ArF laser with \(\lambda\) = 193 nm
• E)a He-Ne laser with \(\lambda\) = 633 nm

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