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70 solutions

Wavelength and Frequency

Q. The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. The change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. The minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kJ/mol. Calculate the longest wavelength visible to the human eye. Express the wavelength in nanometers to three significant figures.

Solved • Feb 8, 2020

Wavelength and Frequency

Q. A microwave oven operates at 2.80 GHz. What is the wavelength of the radiation produced by this appliance? Express the wavelength numerically in nanometers.

Solved • Feb 8, 2020

Wavelength and Frequency

Q. Calculate the wavelength of each of the following frequencies of electromagnetic radiation. 835.6 MHz (common frequency used for cell phone communication) Express your answer in meters using four significant figures.

Solved • Feb 8, 2020

Wavelength and Frequency

Q. Calculate the wavelength of each of the following frequencies of electromagnetic radiation. 1050 kHz (typical frequency for AM radio broadcasting) Express your answer in meters using four significant figures.

Solved • Feb 8, 2020

Wavelength and Frequency

Q. Calculate the wavelength of each of the following frequencies of electromagnetic radiation. 104.4 MHz (typical frequency of FM radio broadcasting) Express your answer in meters using four significant figures.

Solved • Feb 8, 2020

Wavelength and Frequency

Q. An FM radio station broadcasts electromagnetic radiation at a frequency of 98.6 MHz. The wavelength of this radiation is _____ m. a) 0.329 b) 2.96 x 10^10 c) 3.04 d) 2.96 x 10^16 e) 3.04 x 10^6

Solved • Feb 4, 2020

Wavelength and Frequency

Q. Calculate the frequency of the red light emitted by a neon sign with a wavelength of 680 nm. a) 2.27 x 10^14s^-1 b) 3.40 x 10^14s^-1 c) 4.41 x 10^14s^-1 d) 5.05 x 10^14s^-1 e) 3.80 x 10^14s^-1

Solved • Feb 4, 2020