Kerala SCERT Class 7 Science Chapter 2 Wonders of Visible Light Question Answer Solution Here. Kerala Board Class 7 Students can find Here 2nd Chapter Wonders of Visible Light Notes provide by our Teacher. Important Question Answer from Chapter 2 Wonders of Visible Light.
- Board- Kerala Board.
- Class – 7.
- Subject – Science Part 1
- Chapter – 2.
- Chapter Name – Wonders of Visible Light.
- Topic – Question Answer Solution.
Multiple choice questions.
(1) The line drawn perpendicular to the mirror at the point of incidence is called
a) Normal
b) Incident Ray
c) Reflected Ray
d) None of the above.
(2) The angle between the incident ray and the normal is
a) Angle of incidence
b) Angle of Reflection
c) Both
d) None
(3) The angle between the reflected ray and the normal is
a) Angle of incidence
b) Angle of Reflection
c) Both
d) None
(4) The properties of the image formed by a plane mirror are
a) The size of the image will be the same as that of the object
b) The distance between the image and the mirror is equal to the distance between the object and the mirror.
c) The image will undergo lateral inversion.
d) All the above.
5) Lens with a thick central portion and a thin edge is called
a) concave lens
b) convex lens
c) both
d) None.
(6) lens with a thin central portion and thick edges is called
a) Concave lens
b) convex lens
c) both
d) None.
(7) Sunlight is
a) Red light
b) White Light
c) Yellow light
d) Blue light
Questions and answers.
(1) What is regular reflection?
ANS: When light falls on a mirror, steel plate, smooth floor tile etc., it is reflected regularly. This is known as regular reflection.
(2)What is diffused reflection?
ANS: When light falls on rough surfaces, it is reflected irregularly. This is diffuse reflection.
(3) What is plane mirror?
ANS: A mirror with a plane surface is called a plane mirror.
(4) What is refraction?
ANS: When light travels from one medium to another, its path undergoes a deviation. This phenomenon of light is called refraction.
(5) What is Dispersion?
ANS: The phenomenon of the splitting up of white light into its component colours is dispersion.
(6) Which are the colours present in White light?
ANS: White light consists of seven colours. Violet, indigo, blue, green, yellow, orange and red are the colours.
(7) What is Rainbow?
ANS: The rainbow is a colour phenomenon that occurs when sunlight passes through water droplets in the atmosphere.
(8) What is reflection?
ANS: Reflection of light is the return of light that falls on a surface.
(9) What is Lateral inversion?
ANS: shifting of the lateral side of the images in the opposite direction is called lateral inversion.
Short answer Questions.
(1) What are the properties of the image formed by a plane mirror?
ANS: The properties aregiven below:
1) The size of the image will be the same as that of the object.
2) The distance between the image and the mirror is equal to the distance between the object and the mirror.
3) The image will undergo lateral inversion.
(2) What are the uses of different mirrors?
ANS: Uses are given below:
1) concave mirror: i) Shaving mirror ii) Reflector in torch
2) convex mirror: i) Used by drivers to see the vehicles behind (rear view mirror)
3) plane mirror: i) To see our face ii) To make Kaleidoscope.
(3) What are the uses of lenses?
ANS:Uses are given below:
i) We use different types of spectacles to rectify defects of vision. Different types of lenses are used in them.
ii)To see tiny letters and objects in a bigger size, we use hand lens. This is a convex lens. Convex lens is used in equipment like microscope, telescope, camera and projector.