Of the total sunlight, only 2-10% of the solar energy is used by green plants for photosynthesis. Explain why?

Solar energy used by green plants for photosynthesis is only

Solar energy used by green plants for photosynthesis is only ...........

The given graphs shows the productivity of an aquatic ecosystem measured in terms of dissolved oxygen produced and consumed by green plants and photosynthetic algae where PS=photosynthesis and R=respiration. What will happen during algal bloom? 1. PS will be increase, R will be decreased 2. PS will be decreased, R will be increased. 3. PS and R will not change. 4. PS+R will increase.

It is found that photosynthesis starts in certain plants when exposed to the sunlight but it does not start if the plant is exposed only to infrared light. Explain.

A myopic person has been using spectacles of power -1.0 dioptre for distance vision. During old age he also needs to use separate reading glass of power +2.0 dioptres. Explain what may have happened.

Approximately how much of the solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis?

Analyse the given scheme and answer the questions. {:(" Incident solar radiation"-100%),(" "darr),("Photosynthetically Active Radiation (PAR)"-50%),(" "darr),(" Net primary productivity"-0.8%-4%):} a. 50% of solar radiation is available for photosynthesis. Evaluate. b. Net primary productivity is only 0.8-4% . Justify. c. Can you suggest a remedial measure to increase the primary productivity ?

A light beam of wavelength 400 nm is incident on a metal of work- function 2.2 eV . A particular electron absorbs a photon and makes 2 collisions before coming out of the metal (a) Assuming that 10% of existing energy is lost to the metal in each collision find the final kinetic energy of this electron as it comes out of the metal. (b) Under the same assumptions find the maximum number of collisions, the electron should suffer before it becomes unable to come out of the metal.

The bob of a pendulum of length 2 m lies at P. When it reaches Q it loses 10% of its total energy due to air resistance. For this event, which of the following is a correct statement.