Chapter 15 Light
Very Short Questions and Answers
1. What type of mirror is used as a side view mirror in a scooter?
Answer: Â Convex mirror.
2. How can we change the direction of the light?
Answer:Â We can change the direction of the light by phenomenon called reflection.
3. Which type of mirror can form a real image?
Answer: Concave mirror can form a real image.
4. Which type of lens forms always a virtual image?
Answer: Concave lens forms always a virtual image.
5. Give an example of a curved mirror.
Answer: The most common example of a curved mirror is a spherical mirror.
6. What are the two types of spherical mirror?
Answer: The two types of spherical mirror are concave and convex mirrors.
7. What is real image?
Answer: An image which can be obtained on a screen is called a real image.
8. Write some uses of lenses.
Answer: Lenses are widely used in spectacles, telescopes and microscopes.
, 9. What is convex mirror?
Answer: If the reflecting surface is convex, then it is a convex mirror.
10. What happens when light falls on a polished or a shiny surface?
Answer: When light falls on a polished or a shiny surface light gets reflected.
11. What makes things visible to us?
Answer: Objects are visible only when light reflected from them reaches our eyes.
12. What is diverging lens?
Answer: A concave lens diverges (bends outward) the light and is called a diverging
lens.
13. What kind of image is formed by concave lens?
Answer: A concave lens always forms erect, virtual and smaller image than the
object.
14. What is the nature of the image formed by a convex mirror?
Answer: Image formed by a convex mirror is erect, virtual and smaller in size than
the object.
15. What is reflection of light?
Answer: Bouncing back of a light ray after hitting any surface is known as reflection
of light.
16. What is concave mirror?
Answer: If the reflecting surface of a spherical mirror is concave, it is called a
concave mirror.
Very Short Questions and Answers
1. What type of mirror is used as a side view mirror in a scooter?
Answer: Â Convex mirror.
2. How can we change the direction of the light?
Answer:Â We can change the direction of the light by phenomenon called reflection.
3. Which type of mirror can form a real image?
Answer: Concave mirror can form a real image.
4. Which type of lens forms always a virtual image?
Answer: Concave lens forms always a virtual image.
5. Give an example of a curved mirror.
Answer: The most common example of a curved mirror is a spherical mirror.
6. What are the two types of spherical mirror?
Answer: The two types of spherical mirror are concave and convex mirrors.
7. What is real image?
Answer: An image which can be obtained on a screen is called a real image.
8. Write some uses of lenses.
Answer: Lenses are widely used in spectacles, telescopes and microscopes.
, 9. What is convex mirror?
Answer: If the reflecting surface is convex, then it is a convex mirror.
10. What happens when light falls on a polished or a shiny surface?
Answer: When light falls on a polished or a shiny surface light gets reflected.
11. What makes things visible to us?
Answer: Objects are visible only when light reflected from them reaches our eyes.
12. What is diverging lens?
Answer: A concave lens diverges (bends outward) the light and is called a diverging
lens.
13. What kind of image is formed by concave lens?
Answer: A concave lens always forms erect, virtual and smaller image than the
object.
14. What is the nature of the image formed by a convex mirror?
Answer: Image formed by a convex mirror is erect, virtual and smaller in size than
the object.
15. What is reflection of light?
Answer: Bouncing back of a light ray after hitting any surface is known as reflection
of light.
16. What is concave mirror?
Answer: If the reflecting surface of a spherical mirror is concave, it is called a
concave mirror.
