The wavelength for a laser that emits light with a frequency of 3.29 times 10^14

Question

The wavelength for a laser that emits light with a frequency of 3.29 times 10^14 Hz is__nm. Arrange the following types of electromagnetic radiation in order of decreasing frequency: x-rays infrared radio waves gamma rays Which of the following types of radiation has the shortest wavelength? a. Microwaves b. Visible light c. Gamma rays d. Ultraviolet e. Radio waves Which of the following transitions results in absorption of the of the highest-energy photon? a. n=6 rightarrow n=2 b. n=2 rightarrow n=5 c. n=4 rightarrow n=3 d. n=3 rightarrow n=4 e. n=5 rightarrow n=6

Explanation / Answer

1)
= c/f
= (3*10^8)/(3.29*10^14)
=9.12*10^-7 m
= 912 nm
Answer: 912 nm

2)
radio waves < infrared < X-rays < gamma rays

3)
gamma has highest frequency and hence shortest wavelength
Answer: c

4)
when photon is absorbed, electron move from lower level to higher level
a,c are wrong

energy is more is energy difference is more which is correct for b
Answer: b

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