Podcast
Questions and Answers
What is the relationship between energy and wavelength for photons?
What is the relationship between energy and wavelength for photons?
- Energy increases with decreasing wavelength. (correct)
- Energy is directly proportional to wavelength.
- Energy is independent of wavelength.
- Energy is inversely proportional to wavelength. (correct)
Using the formula $E = h.c / \lambda$, what happens to the energy of a photon as its wavelength increases?
Using the formula $E = h.c / \lambda$, what happens to the energy of a photon as its wavelength increases?
- The energy increases steadily.
- The energy decreases. (correct)
- The energy becomes negative.
- The energy remains constant.
If a photon has a wavelength of 400 nm, what is its energy in kJ?
If a photon has a wavelength of 400 nm, what is its energy in kJ?
- 293 kJ (correct)
- 400 kJ
- 169 kJ
- 200 kJ
Which equation represents the relationship between energy, frequency, and Planck’s constant?
Which equation represents the relationship between energy, frequency, and Planck’s constant?
Autotrophs use __________ as their carbon source, while heterotrophs use __________.
Autotrophs use __________ as their carbon source, while heterotrophs use __________.
what is the answer to this Light energy is harnessed through __________, while chemical energy is harnessed through __________ of organic/inorganic substances.
what is the answer to this Light energy is harnessed through __________, while chemical energy is harnessed through __________ of organic/inorganic substances.
briefly describe the Experiment Joseph Priestly carried out to show that plants release oxygen into the atmosphere
briefly describe the Experiment Joseph Priestly carried out to show that plants release oxygen into the atmosphere
which three organisms obtain energy from sunlight
which three organisms obtain energy from sunlight
why do photosynthetic organisms avoid back reactions?
why do photosynthetic organisms avoid back reactions?
What does the annual CO₂ fixation rate of approximately 7 x 10¹⁴ kg suggest in terms of atmospheric turnover?
What does the annual CO₂ fixation rate of approximately 7 x 10¹⁴ kg suggest in terms of atmospheric turnover?
How does the annual O₂ release rate of approximately 5.1 x 10¹⁴ kg relate to atmospheric oxygen turnover?
How does the annual O₂ release rate of approximately 5.1 x 10¹⁴ kg relate to atmospheric oxygen turnover?
Which of the following best explains the relationship between CO₂ fixation and climate change?
Which of the following best explains the relationship between CO₂ fixation and climate change?
define photosynthesis
define photosynthesis
what happens to an atom at ground state after absorbing energy
what happens to an atom at ground state after absorbing energy
what are the three pigments found in the thylakoid of the chloroplast
what are the three pigments found in the thylakoid of the chloroplast
all the 3 pigments absorb light in blue and red regions
all the 3 pigments absorb light in blue and red regions
(accessory)Chlorophyll b shows the highest absorption in which region of the light spectrum?
(accessory)Chlorophyll b shows the highest absorption in which region of the light spectrum?
Why do the pigments not absorb in the green light?
Why do the pigments not absorb in the green light?
what is the primary pigment and what are the accessory pigments
what is the primary pigment and what are the accessory pigments
what are the main backbones of the chlorophyll pigments
what are the main backbones of the chlorophyll pigments
what does the polyene structure in the chlorophyll pigments do
what does the polyene structure in the chlorophyll pigments do
although chlorophyll a and b have similar backbones they differ in functional groups.
match the functional group with the backbone.
although chlorophyll a and b have similar backbones they differ in functional groups. match the functional group with the backbone.
what color does chlorophyll fluoresce when it absorbs high energy light (when illuminated with uv light)
what color does chlorophyll fluoresce when it absorbs high energy light (when illuminated with uv light)
describe the role of the accessory pigments in relation to the reaction center
describe the role of the accessory pigments in relation to the reaction center
whats the condition for fret to occur
whats the condition for fret to occur
energy level of Chlb has to be higher than that of Chla so that transfer of energy can take place
energy level of Chlb has to be higher than that of Chla so that transfer of energy can take place
briefly define the role of the rxn centre
briefly define the role of the rxn centre
whats the name of the complex formed by carotenoids and chlorophylls
whats the name of the complex formed by carotenoids and chlorophylls
Flashcards are hidden until you start studying
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.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
