Scattering of Light

Why do leaves appear green?

Space is mostly vacuum, devoid of any medium. What colour does the Sun appear to the astronauts on International Space Station? Give reasons for your answer.

Nanda saw rays of sunlight entering into a dark room as shown below. He then did something to the air in the room after which he was NOT able to see the rays of sunlight in the room. What is it that Nanda could have done to make the rays of sunlight invisible? Justify your answer.

Rohan lit an incense stick in his room and after an hour observed that when a beam of sunlight entered his room through a small gap in the window, he was able to see the path of the beam. Which of the following is most likely TRUE about the air present in the room?

If the Earth did not have an atmosphere, which of the following shows what you would see if you looked at the Sun?

Reema and her family were travelling to her grandmother's home. They started in the morning. While travelling through the city she observed the traffic signals. She noted down the traffic lights based on their colour and meaning.

She thought about the reasons for choosing these colours and discussed them with her parents. She noticed that even at night, the red colour can be easily seen from a distance.

This is because red is 

Water is taken in a transparent container as shown in the figure. The container is about $20-22 \mathrm{cm}$ long. Now, two drops of milk are added to the water in the container. From the left-hand side, a powerful torch is lighted and shown into the water.

One observes that the colour of the milk-water changes with the distance from the torch. The colour will be milky blue near the torch while on the other end, the colour will be orange or red. On adding a few more drops of milk, the colours become darker. With regard to the above experiment, answer the following question:

If you look at the torch face through the liquid from the right side, it will appear

Which of the following is caused by atmospheric refraction of light?