In the process of photosynthesis, Which of the rays are taken by the plants from sun ?
Explain your answer ( i think it is u-v rays )

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Solution

The red and blue wavelengths of the electromagnetic spectrum are mostly used by plants in photosynthesis. The region between 400nm and 700nm is called as Photosynthetically active radiation (PAR). In this range rate of photosynthesis is very high.

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Question 113(ii)

Sunscreens block harmful ultraviolet (UV) rays produced by the sun. Each sunscreen has a Sun Protection Factor (SPF) that tells you how many minutes you can stay in the sun before you receive one minute of burning UV rays. e.g. If you apply sunscreen with SPF 15, you get one minute of UV rays for every 15 minutes you stay in the sun.
- Suppose, a sunscreen allows 25% of the sun's UV rays.
(a) What fraction of UV rays does this sunscreen block? Give your answer in lowest terms.
(b) Use your answer from part (a) calculate this sunscreen's SPF. Explain how you found your answer?

(1) Photosynthesis is the methodology plants use to transform sunlight

into the nutrition needed to endure and grow. Most plants make

some form of sugar from the sun rays, and the plant employs this sugar as its direct food source.

(2) Plants require only three things to produce this sugar:

daylight, carbon dioxide, and water. The rays react with the

plant's chlorophyll, a green chemical that prepares sugar using the combination of H20 and C02

(3) As a broad rule, photosynthesis happens in plants' leaves.

The leaf has chlorophyll, which responds when daylight strikes the

leaf. The chlorophyll also provides the leaf with its distinctive green

colour since photosynthesis interests most sun rays, excluding green

echoed outside.

(4) The method of photosynthesis creates more than simply sugar. One byproduct of the procedure is oxygen, which is "exhaled."

by the plant into the environment. Plant photosynthesis is one

of the main origins of oxygen creation on our planet, driving

plant life necessary to practically all living things.

Read the following choices to infer photosynthesis based on the above passage.

(a) Which gas in the atmosphere is utilised by the trees and plants in photosynthesis ?
(b) Which gas in the atmosphere traps the heat rays reflected by the earth ?

Q. Assume you are sitting in sun for 2.5 hours. The area of your body exposed normally to sun rays

{1.3 m}^{2}

. The intensity of sun rays is 1.1 Kilowatt/

m^{2}

. If your body completely absorbs the sun rays then the momentum transferred to your body will be (in Kg-m/s):

Q. Which gases are taken in and released out by the plants during the process of photosynthesis?

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In the process of photosynthesis, Which of the rays are taken by the plants from sun ?Explain your answer ( i think it is u-v rays )

The red and blue wavelengths of the electromagnetic spectrum are mostly used by plants in photosynthesis. The region between 400nm and 700nm is called as Photosynthetically active radiation (PAR). In this range rate of photosynthesis is very high.

In the process of photosynthesis, Which of the rays are taken by the plants from sun ?
Explain your answer ( i think it is u-v rays )