It was observed that when the distance between an object and a lens decreases, the size of the image increases. What is the nature of this lens? If you keep on decreasing the distance between the object and the lens, will you still able to obtain the image on the screen? Explain

You are given three mirrors of different types. How will you identify each one of them?

Namit was driving a car and suddenly became aware of a loud sound coming from behind. He looked through his rear view mirror and saw an ambulance. He recalled reading that such emergency vehicles often have their name written in the mirror (AMBULANCE) or writing,
i.e. 3 J VI A J U 8 M A.
He quickly made way for the ambulance, murmuring a quick prayer for the speedy recovery of the patient inside the ambulance.
(a) Name the type of mirror which is used as a rear view mirror and why?
(b) Mention values did Namit exhibit.

One day, Ramesh's friend was performing their respective experiments given by their teacher. While sitting in the practical lab instead of performing experiment, Ramesh was playing with his meter scale. All the sudden, he held the scale in his hand and started moving in front of tubelight, then he observed the seven colours of white light. After sometimes, he got scolded by his lab teacher for not performing the experiment.
(a) Give the name of phenomenon that leads to the formation of band of seven colours.
(b) Name the constituent colours of white light.
(c) Mention the values shown by Ramesh here.

Last Sunday Girish's mother, Priyanka was preparing the dinner in her kitchen for Girish and his father. Both of them were feeling so much hungry and they sat ideally on their respective chairs and having empty plates and spoons on their dinning table. They were shouting like a 5 years old child that they wanted the dinner so much eagerly in order to fulfil their stomach. At the sometime, Girish's mother served the cooked food to both of them and the moment, when Girish was just about to eat the rice with the help of spoon, he noticed that the spoon has such a shining surface that it reflected the light rays incident on it.
(a) Explain the importance of shining surface in the reflection of light.
(b) Name the type of spherical mirror represented by the shining steel spoon.
(c) Mention the values shown by Priyanka here towards her family.

Give the properties of the images formed by the following:
(i) Plane mirror
(ii) Concave mirror
(iii) Convex mirror
(iv) Concave lens
(v) Convex lens.

Draw the ray diagram formed by a convex lens under three different positions of the object.

Give one use of all mirrors and lenses.

A jug placed facing a plane mirror. Draw the position or image of jug.

Answer the following questions:
(i) What is the size of the image of the jug?
(ii) What is the distance between image of jug and mirror?

Draw the ray diagrams formed by a concave mirror under three different positions of the objects.