________ acts as a shield absorbing ultraviolet radiation from the sun.
Ozone
The stratospheric ozone (\(\text{O}_3\)) layer absorbs most of the sun's harmful UV-B and UV-C radiation, acting as Earth's protective shield.
Chlorofluorocarbons (CFCs) deplete this shield rather than form it; the "ozone hole" is a region of depletion, not the shield itself; greenhouse gases trap infrared (heat), not UV. Hence the answer is Ozone.
According to Central Pollution Control Board (CPCB), particulate size ________ micrometres or less in diameter are responsible for causing the greatest harm to human health.
In Microsoft Word, _______ allows us to move selected paragraphs to the right.
An absolute ________ contains the complete address of a file on the Internet.
What is the full form of JPEG?
Netscape Navigator is a ________.
Who discovered Penicillin?
________ are designed to read and interpret HTML.
Who invented the electric tram?
Who discovered Potassium?
Who among the following scientists invented the Cotton Gin?
Who has developed the technology enabling India to shoot down fixed-wing drones using a laser beam?
Consider the following statements:
1. Aditya-L1, a space observatory with 9 payloads designed to study the Sun.
2. The VELC will take image the Sun's atmosphere, the Corona at high resolution and time cadence.
3. Aditya -L1 carries an ultraviolet imager, 3 X-ray spectrometer and four in -situ instruments to measure plasma parameters.
How many of the statements given above are correct?