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Energy of Light

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Wize University Chemistry Textbook > Early Atomic Theory to Quantum Theory

Electromagnetic Radiation

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A UV light of frequency 2.73 ⋅\cdot 1016 s−1 is ____ times _____ in energy than a yellow light of frequency 5.26 ⋅\cdot 1014 s−1
More Electromagnetic Radiation Questions:
Electromagnetic Radiation
A green laser pointer emits light at 532.0 nm. What is the frequency of this radiation?
Electromagnetic Radiation: Photon energy
A laser emits light at a wavelength of 710 nm.
What is the energy of a single photon from this laser?
Electromagnetic radiation: Wave energy
A laser emits light at a wavelength of 710 nm.
What is the frequency of this light?
Photon
What is the energy of a light wave with frequency of 1.04×1015Hz1.04\times10^{15}Hz?
Electromagnetic Radiation
As the wavelength of light decreases, which is also true of light?
Electromagnetic radiation
Which of the following wavelengths corresponds to a photon in the infrared region of
the electromagnetic spectrum?
Electromagnetic Radiation
If a photon of light has λ=478 nm,\lambda=478\ nm, what is it’s wavelength in meters?
Electromagnetic Radiation
A green laser pointer emits light at 532.0 nm. What is the frequency of this radiation?
Electromagnetic Radiation
Which of the following statements are true?
i. When an electron falls to a lower energy level in an atom, it emits electromagnetic radiation.
ii. The energy of electromagnetic radiation is directly proportional to its frequency.
Electromagnetic radiation: Frequency of light
Your mean professor (in a different course) shines a red laser pointer into your eye with a wavelength of 666 nm. What is the frequency of this light?
Electromagnetic Radiation: Photon energy
A laser emits light at a wavelength of 710 nm.
What is the energy of a single photon from this laser?
A laser emits light at a wavelength of 710 nm.
What color is the laser?
Laser Emitting Photons Problem
A laser emits a light beam with a power of 5 mW. The wavelength of the light is 374 nm. How many photons per second does this laser emit? (3mW=3mJ/s) Hint: Calculate the energy of a single photon
Power=5mW (light beam) based on conversion provided I know this is equal to 5mJ/s
wavelength=374nm -> convert to m: 1nm=1x10-9m, so 374x10-9m
Wavelength
Which of the following has the longest wavelength?
Electromagnetic Radiation
4. Rank the following from longest wavelength to shortest wavlength: Microwaves, ultraviolet, infrared, visible light, and X-rays. (In the table, 1=longest and 5=shortest)
Electromagnetic Radiation
An organic molecule absorbs radiation that has a frequency of 2.8 x 1015 s-1.
a) What is the wavelength of radiation?
b) What is the energy of radiation?
Electromagnetic Radiation
6. A carbon-nitrogen bond in an organic molecule absorbs radiation that has a frequency of 4.3 x 1012 s-1.
a) What is the wavelength of radiation?
b) What is the energy of radiation?
Electromagnetic Radiation
5. Which of the following statements are true?
Electromagnetic radiation: Wave Energy
Calculate the energy of one photon whose wavelength is 589 nm.
Practice: Photon
What is the energy of a light wave with frequency of 1.04×1015Hz1.04\times10^{15}Hz?
Electromagnetic Radiation
What is the wavelength of a photon of light, which has a frequency of 2.8 x 1014 Hz?
A photon of light has a wavelength of 700 nm. What is its frequency?
Electromagnetic radiation: Wave energy
A laser emits light at a wavelength of 710 nm.
What is the frequency of this light?
If a light wave has a wavelength of 420 nm, what is it’s frequency?
If the answer has an exponent write it like this 1.23x10^4 (no spaces)
Electromagnetic Radiation: Practice
Rank the following types of electromagnetic radiation from lowest to highest energy.
Radio Waves, Infrared Radiation, X-rays, Microwaves, Visible Light, UV Radiation
Transverse Waves
Use the graph below to answer the following questions:
1. Which wave has the lowest energy?
D
2. What is the wavelength of wave A?
200nm
Choose one of the following statements which is FALSE
An electromegnetic wave undergoes three complete oscillations over a 360 nm segment of space. What is the frequency of this wave?
Electromagnetic Radiation
Rank the following types of electromagnetic radiation from lowest to highest energy.
Radio Waves, Infrared Radiation, X-rays, Microwaves, Visible Light, UV Radiation
Electromagnetic Radiation: Energy
A photon has wavelength of 2.0 cm in space. What is its energy?
Electromagnetic Radiation: Energy of Blue Laser Pointers
An argon ion laser produces a blue laser beam with a wavelength of 458 nm. What is the energy of this light expressed in kJ/mol?
What is the wavelength of a an electromagnetic wave with a frequency of 3.78 x 1015 s-1?