Question : Ozone protects biosphere from:
Option 1: X -rays
Option 2: Gamma rays
Option 3: Ultraviolet rays
Option 4: Infrared rays
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Correct Answer: Ultraviolet rays
Solution : The correct option is Ultraviolet rays.
Ozone is critical in safeguarding the biosphere from the sun's damaging ultraviolet (UV) radiation. Ozone molecules have a unique ability to absorb and block a considerable fraction of incoming UV light, particularly UV-C and UV-B photons with shorter wavelengths. When these high-energy UV photons collide with ozone molecules in the stratosphere, their energy is transformed to heat.
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Question : The ozone layer is formed due to reactions of:
Option 1: oxygen and ultraviolet rays
Option 2: carbon dioxide and layers of the atmosphere
Option 3: cosmic rays and layers of atmosphere
Option 4: infrared rays and ultraviolet rays
Question : What is the correct order of radiations in descending order of frequencies?
Option 1: Infrared > Microwaves > Radio waves > X-rays
Option 2: Radio waves > X-rays > Microwaves > Infrared
Option 3: X-rays > Infrared > Microwaves > Radio waves
Option 4: Infrared > Microwaves > X-rays > Radio waves
Question : Thymine dimer formation in DNA is caused by
Option 1: IR-rays
Option 2: X-rays
Option 3: b and g-rays
Option 4: UV-rays
Question : Which of the following waves cannot be polarized?
Option 1: Radio
Option 2: Ultraviolet
Option 3: Infrared
Option 4: Ultrasonic
Question : Ultraviolet radiation in the stratosphere is absorbed by
Option 1: SO2
Option 2: Ozone
Option 3: Oxygen
Option 4: Argon
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