Question

A plant is given, ultra violet, visible and then infra-red
light one after another. What happens in each of the
case.​

Answer 1

Answer:

it's frequency is decreasing and wavelength is increasing.

Answer 2

Explanation:

UV ray case- At the rate of photosynthesis will increase, the UV rays will work as a booster for photosynthesis for plant but after at an instant it will start damaging the plant tissue and may show abnormalities in plants.

Visible light case- In this case normal Photosynthesis, would be able to seen, no change in speed and growth will take place. The grown plant will be normal.

Infrared Rays- These rays will provide heat to plant and the plant will grow fast. Increase in light it will affect the growth of speed and the plant may got burned.

conclusion: you have to decide on your understanding basis.