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Questions and Answers
What is the relationship between energy and wavelength for photons?
Using the formula $E = h.c / \lambda$, what happens to the energy of a photon as its wavelength increases?
If a photon has a wavelength of 400 nm, what is its energy in kJ?
Which equation represents the relationship between energy, frequency, and Planck’s constant?
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Study Notes
Light and Photons
- Light is composed of waves and particles called photons.
- Photons are units of energy, also known as light quanta.
- The energy of a photon is directly proportional to its frequency (ν) and inversely proportional to its wavelength (λ).
- The relationship between energy (E), frequency (ν), wavelength (λ), and Planck's constant (h) is given by:
- E = hν
- λν = c (where c is the velocity of light in a vacuum)
- E = hc/λ
- The energy of a photon is directly proportional to its frequency: E ∝ 1/λ.
- This means that higher frequency photons have more energy.
Energy Content of Photons
- The energy content of photons is measured in quanta.
- A mole of quanta with a wavelength of 700 nm has an energy of 169 kJ.
- A mole of quanta with a wavelength of 400 nm has an energy of 293 kJ.
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Description
Test your understanding of light and photons through this quiz. Explore concepts such as the energy of photons, their relationship with frequency and wavelength, and more. Perfect for students studying physics!
