Electrically charged particles from space travelling at speeds of several hundred km/s can severely harm living beings if they reach the surface of the Earth. What prevents them from reaching the surface of the Earth?

What is the role of Ultraviolet (UV) radiation in the water purification system?
1. It inactivates/kills the harmful microorganisms in water.
2. It removes all the undesirable odours from the water.
3. It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of the water.
Which of the statement(s) given above is/are correct?

A team of scientists at Brookhaven National Laboratory including those from India created the heaviest anti-matter (anti-helium nucleus). What is/are the implication/implications of the creation of anti-matter?
1. It will make mineral prospecting and oil exploration easier and cheaper.
2. It will help probe the possibility of the existence of stars and galaxies made of anti-matter.
3. It will help to understand the evolution of the universe.
Select the correct answer using the codes given below:

The efforts to detect the existence of Higgs Boson particle have become frequent news in the recent past. What is/are the importance/importances of discovering this particle?
1. It will enable us to understand as to why elementary particles have mass.
2. It will enable us in the near future to develop the technology of transferring matter from one point to another without traversing, the physical space between them.
3. It will enable us to create better fuels for nuclear fission.
Select the correct answer using the codes given below:

Consider the following phenomena:
$1$. Size of the Sun at dusk.
$2$. Colour of the Sun at dawn.
$3$. Moon being visible at dawn.
$4$. Twinkling of stars in the sky.
$5$. Polestar being visible in the sky.
Which of the above are optical illusions?

Rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena are responsible for this?
1. Dispersion
2. Refraction
3. Internal reflection
Select the correct answer using the codes given below