What happens to chlorophyll when it is hit by light?

What happens to chlorophyll when it is hit by light?

A photon of light hits chlorophyll, causing an electron to be energized. The free electron travels through the electron transport chain, and the energy of the electron is used to pump hydrogen ions into the thylakoid space, transferring the energy into the electrochemical gradient.

What caused the BTB to turn yellow?

Bromothymol blue (BMB) is an indicator dye that turns yellow in the presence of acid. When carbon dioxide is added to the solution, it creates carbonic acid, lowering the pH of the solution.

What is the purpose of the Bromothymol blue BTB solution?

Bromothymol blue (also known as bromothymol sulfone phthalein and BTB) is a pH indicator. It is mostly used in applications that require measuring substances that would have a relatively neutral pH (near 7). A common use is for measuring the presence of carbonic acid in a liquid.

When oxygen is released as a result of photosynthesis it is a byproduct of which of the following?

In photosynthesis, solar energy is harvested as chemical energy in a process that converts water and carbon dioxide to glucose. Oxygen is released as a byproduct. In cellular respiration, oxygen is used to break down glucose, releasing chemical energy and heat in the process.

How do plants absorb light for photosynthesis?

Within the thylakoid membranes of the chloroplast is a light-absorbing pigment called chlorophyll, which is responsible for giving the plant its green color. During photosynthesis, chlorophyll absorbs energy from blue- and red-light waves, and reflects green-light waves, making the plant appear green.

Why would the the bromothymol blue solution with the plant kept in light turn blue in course of time?

After time in the sunlight, the plant would begin photosynthesis. It would use the CO2 present in the vial and the sunlight. The BTB would turn Blue. At night the plant doesn’t have sunlight available so it would only respire or give off CO2 which would turn the BTB yellow.

When oxygen is released as a result of?

Oxygen is released during the light reactions of photosynthesis. Water, or H2O , is split during the light reactions into gaseous oxygen, or O2 , as well as H+ protons and electrons. The electrons reduce the P680+ pigments in photosystem II once they donate their excited electrons to the primary electron acceptor.

What causes the color change in a deprotonation reaction?

In each case, the deprotonation on an OH group causes the color change to arise. The indicators provide the primary colors that are a base for the orange, green and violet. Four beakers (or crystallizing dishes) are filled to the same level: two contain water while two contain acetate buffer. Indicators are added to each.

What is the principle of light reflection and transmission?

Visible Light Reflection and Transmission. Reflection and transmission of light waves occur because the frequencies of the light waves do not match the natural frequencies of vibration of the objects. When light waves of these frequencies strike an object, the electrons in the atoms of the object begin vibrating.

Why do objects appear different colors under different light?

We observe that the same object appears different colors when viewed under different light. So the secret to an object’s appearance is not strictly due to its ability to produce a color. In fact the object’s only role in determining its appearance is in its ability to absorb certain wavelengths of light which shine upon it.

What is selective absorption of light by a particular material?

Subsequently, the light wave with that given frequency is absorbed by the object, never again to be released in the form of light. So the selective absorption of light by a particular material occurs because the selected frequency of the light wave matches the frequency at which electrons in the atoms of that material vibrate.