Class 7 Science Chapter 13 Practice Question Answers - Light

Q1. Light travels in:
(a) curved line
(b) straight line
(c) linear line
(d) can’t say
Ans: (b)
Light travels in straight line.

Q2. is the change of direction of light that is falling on a mirror.
(a) direction
(b) conversion
(c) reflection
(d) none of these
Ans: (c)
Reflection is the change of direction of light that is falling on a mirror.

Q3. The image formed by plane mirror is:
(a) erect
(b) virtual
(c) concave
(d) convex
Ans: (a)
The image formed by plane mirror is erect.

Q4. An image formed by a mirror or lens which is upright is:
(a) virtual
(b) concave
(c) erect
(d) convex
Ans: (c)
An image formed by plane mirror or lens which is upright is erect.

Q5. An image being in such a position that top and bottom are reversed is:
(a) erect
(b) virtual
(c) concave
(d) inverted
Ans: (d)
An image being in such a position that top and bottom are reveresed is inverted.

Q6. The image formed by a plane mirror is:
(a) erect
(b) laterally inverted
(c) convex
(d) concave
Ans: (b)
The image formed by a plane mirror is laterally inverted.

Q7. A spherical mirror is a part of:
(a) sphere
(b) rectangle
(c) circle
(d) square
Ans: (a)
Spherical mirror is a part of sphere.

Q8. The most common example of a curved mirror is a:
(a) concave mirror
(b) erect mirror
(c) convex mirror
(d) spherical mirror
Ans: (d)
The most common example of a curved mirror is a spherical mirror.

Q9. If the reflecting surface of a spherical mirror is then it is called a concave mirror.
(a) concave
(b) erect
(c) convex
(d) virtual
Ans: (a)
If the reflecting surface of a spherical mirror is concave, then it is a concave mirror.

Q10. If reflecting surface is convex, then it is a:
(a) concave mirror
(b) erect
(c) virtual
(d) convex mirror
Ans: (d)
If reflecting surface is convex, then it is a convex mirror.

Q11. An image formed on a screen is called:
(a) virtual image
(b) concave image
(c) real image
(d) convex image
Ans: (c)
An image formed on a screen is called real image.

Q12. An image which cannot be obtained on a screen is called:
(a) erect image
(b) concave image
(c) virtual image
(d) real image
Ans: (c)
An image which cannot be obtained on a screen is called virtual image.

Q13. The image formed by a plane mirror is called:
(a) virtual
(b) real
(c) erect
(d) concave
Ans: (a)
An image formed by a plane mirror is virtual.

Q14. The image formed by a concave mirror can be smaller or larger in size than the object, the image may also be real or:
(a) erect
(b) virtual
(c) convex
(d) concave
Ans: (b)
The image formed by concave mirror can be smaller or larger in size than the object, the image may also be real or virtual.

Q15. The mirror used by doctor for examining eyes, ears, nose and throat is:
(a) real
(b) concave
(c) virtual
(d) convex
Ans: (b)
The mirror used by doctor for examining eyes, ears, nose and throat is concave.

Q16. Mirrors used by dentists to see an enlarged image of the teeth are:
(a) concave
(b) real
(c) virtual
(d) convex
Ans: (a)
Mirrors used by dentists to see an enlarged image of the teeth are concave.

Q17. Image of objects spread over a large area form in:
(a) concave mirror
(b) virtual mirror
(c) spherical mirror
(d) convex mirror
Ans: (d)
Image of objects spread over a large area form in convex mirror.

Q18. Image formed is same as the object in which of the following mirror:
(a) plane
(b) convex
(c) concave
(d) spherical
Ans: (a)
Image formed is same as the object is in plane mirror.

Q19. The mirror used in scooters, cars etc. to see the vehicles coming from the back is:
(a) concave mirror
(b) convex mirror
(c) plane mirror
(d) virtual mirror
Ans: (c)
The mirror used as a shaving mirror is plane mirror.

Q20. Which of the following mirror is a car mirror made up of convex mirror that reflects the view out of the rear window?
(a) concave mirror
(b) rear-view mirror
(c) convex mirror
(d) none of these
Ans: (b)
Rear view mirror is a car mirror made up of convex mirror.

Q22. Lens are widely used in:
(a) spectacles
(b) telescopes
(c) microscope
(d) all of these
Ans: (d)
Lens are widely used in spectacles, telescopes and microscopes.

Q23. Those lenses which feel thicker in the middle than that the edges are:
(a) concave lens
(b) real lens
(c) convex lens
(d) can’t say
Ans: (c)
Those lenses which feel thicker in the middle than the edges are convex lens.

Q24. Light can pass through lenses as they are:
(a) translucent
(b) opaque
(c) black
(d) transparent
Ans: (d)
Light can pass through lenses as they are transparent.

Q25. Looking through a lens at the sun or a bright light is:
(a) easy
(b) dangerous
(c) difficult
(d) good
Ans: (b)
Looking through a lens at the sun or bright light is dangerous.

Q26. Those lenses which feel thinner in the middle then at the edges are:
(a) concave
(b) convex
(c) real
(d) spherical
Ans: (a)
Those lenses which feel thinner in the middle than the edges are concave lens.

Q27. Convex lens converges the light generally falling on it and it is called:
(a) diverging lens
(b) concave lens
(c) converging lens
(d) coming lens
Ans: (c)
Convex lens converges the light generally falling on it and is called converging lens.

Q28. A convex lens can form:
(a) horizontal and vertical image
(b) real and inverted image
(c) real and virtual image
(d) virtual and erect image
Ans: (b)
A convex lens can form real and inverted image.

Q29. A concave lens diverges the light and is called a:
(a) diverging lens
(b) converging lens
(c) convex lens
(d) real lens
Ans: (a)
A concave lens diverges the light and is called a diverging lens.

Q30. When the object is placed very close in the lens, the image formed is virtual erect and:
(a) real
(b) smaller in size
(c) magnified
(d) bigger in size
Ans: (c)
When the object is placed very close to the lens, the image formed is virtual, erect and magnified.