GENERAL SCIENCE #25
MULTIPLE CHOICE QUESTIONS
1. What
is called a smooth shining surface, which rebounds the light back in same or in
different direction?
(a) A mirror
(b) A lens
(c) Reflection of light
(d) Point of incidence
Answer:
(a)
2. What
is called the beam of light striking the reflecting surface?
(a) Reflecting ray
(b) Incident ray
(c) Refracted ray
(d) Normal ray
Answer:
(b)
3. What
is called the band of seven colours?
(a) VIBGYOR
(b) Spectrum
(c) Dispersion
(d) Reflection
Answer:
(b)
4. What
is called the front bulged part of the eyeball?
(a) Cornea
(b) Choroid
(c) Pupil
(d) Retina
Answer:
(a)
5. Which
one of the following statements is correct regarding rods and cones in the
human eye?
(a) Cones are sensitive to dim light
(b) Cones are sensitive to bright light
(c) Rods are sensitive to bright light
(d) Rods can sense colour
Answer:
(b)
6. In
case of reflection of light, the angle of incidence (i) and the angle of
reflection (r) are related as ……………
(a) i = r
(b) i < r
(c) i > r
(d) No definite relation
Answer:
(a)
7. Name
the type of mirror used as a backview mirror.
(a) Plane mirror
(b) Concave mirror
(c) Convex mirror
(d) All of the above
Answer:
(c)
8. Visually
impaired people can read and write using which of the following?
(a) Electronic writer
(b) Digital pens
(c) Braille system
(d) Hearing aids
Answer:
(c)
9. The
image formed by a camera and a simple microscope are respectively ……………
(a) Real and real
(b) Real and virtual
(c) Virtual and virtual
(d) Virtual and real
Answer:
(b)
10. What
is the angle of incidence of a ray if the reflected ray is at an angle of 90°
to the incident ray?
(a) 60°
(b) 45°
(c) 90°
(d) 180°
Answer:
(b)
11. What
is called the splitting of white light into its seven constituent colours?
(a) Refraction
(b) Dispersion
(c) Deviation
(d) Reflection
Answer:
(b)
12. What
is called the defect due to which a person is not able to see the distant
objects clearly?
(a) Myopia
(b) Hypermetropia
(c) Cornea
(d) Cataract
Answer:
(a)
13. The
amount of light entering the eye is controlled by which of the following?
(a) Eye lens
(b) Cornea
(c) Iris
(d) Ciliary muscle
Answer:
(c)
14. Myopia
can be corrected by using which of the following?
(a) Concave lens
(b) Convex lens
(c) Opaque lens
(d) Micro lens
Answer:
(a)
15. Light
enters the eye through which of the following?
(a) Eye lens
(b) Pupil
(c) Cornea
(d) Retina
Answer:
(c)
16. If
the angle of incidence of light falling on a plane mirror is 30°, what will be
the angle of reflection?
(a) 90°
(b) 60°
(c) 30°
(d) 0°
Answer:
(c)
17. When
we stand in front of our dressing table, our left hand seems to be right and
right seems to be left. This is called ……………
(a) Left-right confusion
(b) Lateral inversion
(c) Up -side down phenomenon
(d) Mirage
Answer:
(b)
18. Light
passing through a prism splits into seven colours. This is called ……………
(a) Dispersion
(b) Dissolution
(c) Division
(d) None of the above
Answer:
(a)
19. Rainbow
is a natural phenomenon showing which of the following?
(a) Reflection
(b) Deflection
(c) Dispersion
(d) Diversion
Answer:
(c)
20. What
is called the area having no sensory cells in the retina of the eye?
(a) Iris
(b) Blind spot
(c) Cornea
(d) Dark spot
Answer:
(b)
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