Science 2 Marks Questions

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.

The image formed by a lens is always virtual, erect and smaller in size for an object kept at different positions in front of it. Identify the nature of the lens.

What type of mirror is used as a side mirror in a scooter? Why is this type of mirror chosen?

Boojho made light from a laser torch to fall on a prism. Will he be able to observe a band of seven colours? Explain with a reason.

Two different types of lenses are placed on a sheet of newspaper. How will you identify them without touching?

The concave reflecting surface of a torch got rusted. What effect would this have on the beam of light from the torch?

The side mirror of a scooter got broken. The mechanic replaced it with a plane mirror. Mention any inconvenience that the driver of the scooter will face while using it.

Boojho saw an ambulance on the road. He was surprised to see the word 'AMBULANCE' in front was written in a strange manner. Why?

A shopkeeper wanted to fix a mirror which will give a maximum view of his shop. What type of mirror should he use? Give reason.

Can you get a real image at any distance of the object from the convex mirror?

The distance between an object and a convex lens is changing. It is noticed that the size of the image formed on a screen is decreasing. Is the object moving in a direction towards the lens or away from it?

Suppose we wish to obtain the real image of a distant tree. Explain two possible ways in which we can do it.

Differentiate between a plane mirror, concave mirror and a convex mirror without touching them.

Explain the term lateral inversion.

Mention any two letters of English alphabet whose image formed in a plane mirror appears exactly similar to the letters.

Mention the type of image
(i) which can be formed on the screen.
(i) which cannot be formed on the screen.

We need a shiny surface for reflection. Explain why?

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.
He quickly made way for the ambulance, murmuring a quick prayer for the speedy recovery of the patient inside the ambulance.
(i) Name the type of mirror which is used as a rear view mirror and why?
(ii) What values did Namit exhibit.

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

Give two uses each of a convex and a concave mirror.

State two differences between a convex and a concave lens.

Find out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.

State the characteristics of the image formed by a plane mirror.

Write the characteristics of the image formed by a concave lens.

State the nature of the image formed in different mirrors when held close to the face.

Write the differences between virtual image and real image.

State any two observations from everyday life which show that light travels in straight lines.