this 4 question i dont understand 1 what is the frequency of radiation that has a wavelength of

1. The frequency of radiation can be calculated using the formula c = λν, where c is the speed o

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1. What is the frequency of radiation that has a wavelength of 3.26 km? (c = 3.00 x 10^8 m/s) A. 92.0 GHz B. 92.0 MHz C. 92.0 kHz D. 92.0 Hz E. 92.0 mHz 2. What wavelength of radiation has photons of energy equal to 1.59 x 10^–20 J? (c = 3.00 x 10^8 m/s; h = 6.626 x 10^–34 J·s) A. 12.5 nm B. 1.25 x 10^–6 m C. 2.40 x 10^13 m D. 1.05 x 10^–53 m E. 12.5 µm 3. Given that the work function of zirconium is 391 kJ/mol, find the threshold frequency of a photon that is capable of ejecting an electron from metallic zirconium. A. 0.649 zHz B. 98.0 GHz C. 98.0 THz D. 0.649 MHz E. 0.980 PHz 4. What is the wavelength of a photon emitted when the electron in a hydrogen atom undergoes a transition from the state with n = 5 to the state with n = 1? A. 2.09 x 10^–18 m B. 95.0 nm C. 316 nm D. 3.16 x 10^15 m E. 7.84 x 10^–8 m

          1. What is the frequency of radiation that has a wavelength of 3.26 km? (c = 3.00 x 10^8 m/s)
A. 92.0 GHz
B. 92.0 MHz
C. 92.0 kHz
D. 92.0 Hz
E. 92.0 mHz

2. What wavelength of radiation has photons of energy equal to 1.59 x 10^–20 J? (c = 3.00 x 10^8 m/s; h = 6.626 x 10^–34 J·s)
A. 12.5 nm
B. 1.25 x 10^–6 m
C. 2.40 x 10^13 m
D. 1.05 x 10^–53 m
E. 12.5 µm

3. Given that the work function of zirconium is 391 kJ/mol, find the threshold frequency of a photon that is capable of ejecting an electron from metallic zirconium.
A. 0.649 zHz
B. 98.0 GHz
C. 98.0 THz
D. 0.649 MHz
E. 0.980 PHz

4. What is the wavelength of a photon emitted when the electron in a hydrogen atom undergoes a transition from the state with n = 5 to the state with n = 1?
A. 2.09 x 10^–18 m
B. 95.0 nm
C. 316 nm
D. 3.16 x 10^15 m
E. 7.84 x 10^–8 m

Added by Michael M.

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