Mr.Vishwanathan, a retired professor of physics was walking with his grandson. It was last week of December and it was drk aruond 5.30 pm. The streetlights were on and the yellow light flooded the area around. The boy asked professor why yellow lights were used when light was beighter. The professor answered that during foggy days the tiny droplets act as prisms splitting white light light into its constituwnt colours and thus reducing the clarity.
Read the above passage and give the answer of the following questions:
(i) What phenomenon was the professor referring to? Why does it happen?
(ii) Give one application of prism.
(iii) What values of the boy are being reflected from the conversation?

Kanchan while driving her scooty sees a woman behind driving a moped through his rear view mirror. She sees that her saree is almost touching the wheels of the vehicle. She stops her and alert that it may cause a severe accident.
Read the above passage and answer the folllowing questions:
(i) What values do you observe in Kanchan?
(ii) Name the mirror used in rear view in scooty. Draw a ray diagram for the same.

Kritika's mom is finding difficult to cook in the kitchen as there was power-cut and she told the same to Kritika. She immediately took a plane mirror from her shelf made it stand against a wall such that sun rays were focussed into the Kitchen due to the reflection of the mirror. There was some lighting and her mother was able to finish her work.
Read the above passage and answer the following question:
(i) What are the values shown by Kritika?
(ii) Name the types of mirror used in periscope.
(iii) Give the nature of image in case of plane mirror.

One day, Chetan's mother developed a sever stomach ache all of a sudden. She immediately rushed to the doctor, who suggested for an immediate endoscopy test and gave an estimate of expenditure for the same. Chetan immediately contacted his class teacher and shared the information with her. The class teacher arranged the money and reached to the hospital. On realising that Chetan belonged to a below average incom group of family, even the doctor offered concession for the test fee.The test was conducted successfully.
Read the above passage and answer the following questions:
(i) Which principle of optics is used in endoscopy?
(ii) Briefly explain the values reflected in the action taken by the teacher.
(iii) In what way do you appreciate the response of the doctor on the given situations?

Ravi wanted to buy a gift for his sister and so he entered inside a gift shop. The gift shop had many glass items. On looking closely, he found many of the beverage glasses used for cold drinks had big thick glass walls. He decided not to buy these glasses because he knows that this gives a false impression that there is more amount of liquid inside the glass.
Read the above passage and answer the following questions:
(i) How does Ravi know about the false impression given by the beverage glasses made with very thick glass walls?
(ii) What values can you associate with Ravi decision?