10th Science Chapter-02 Optics Creative Questions and Answers Part -03
10th Science Chapter-02 Optics Creative Questions and Answers Part -03
a) Both nearby & far off
b) Only nearby objects
c) Only far off objects
d) Neither nearby nor far off objects
Correct answer
Only nearby objects
02.In inelastic scattering,the energy of incident and scattered light are same
a) True
b) False
Correct answer
False
03.The distance measured against direction of incident light are taken as possible
a) True
b) False
Correct answer
True
04.An object is placed at 12 cm from a convex lens whose focal length is 10 cm. The image must
a) Virtual and enlarged
b) real and reduced in size
c) Virtual and reduced size
d) real and enlarged size
Correct answer
real and reduced in size
05.The image formed by retina of human eye is
a) Virtual and eract
b) Real & inverted
c) Virtual & inverted
d) Real and erect
Correct answer
Real & inverted
06.In raman scattering , the scattered light contains the lines having frequency less than incident is Antistokes
a) True
b) False
Correct answer
False
07.Th change in the focal of human eye is caused by
a) pupil
b) Ciliary muscles
c) Cornea
d) Iris
Correct answer
Ciliary muscles
08.The defect of myopia can be corrected by using
a) Concave lens
b) Convex lens
c) Combination of lenses
d) None
Correct answer
Concave lens
09.A small bulb is placed at the principal focus of a convex lens. When the bulb is switched on, the lens will produce
a) a convergent beam of light
b) a divergent beam of light
c) a parallel beam of light
d) a coloured beam of light
Correct answer
a parallel beam of light
10.Refractive intex gives an idea about the velocity of light in a medium
a) True
b) False
Correct answer
True
11.A convex lens is used to correct the defect of
a) Presbyopia
b) Hypermeteropia
c) Myopia
d) Astigmatism
Correct answer
Hypermeteropia
12.Simple microscope consists of
a) Short focal length convex
b) Large focal length of concave
c) Short focal length of concave
d) Large focal length of convex
Correct answer
Short focal length convex
13.Magnification power of microscopes can be included by using of length
a) Large focal eye piece
b) Objective lens
c) Shorter focal length of the piece
d) Large focal length of objective
Correct answer
Large focal eye piece
14.If the energy of the incident and scattered beam of light are same then it is called ____ scattering
a) Ray light
b) Inelastic
c) Mie
d) Elastic
Correct answer
Elastic
15.The amount of light entering the human eye is
a) Ciliary muscles
b) pupil
c) Cornea
d) Iris
Correct answer
pupil
16.The splitting up of white light into colours is called
a) reflection
b) refrection
c) scattering
d) dispersion
Correct answer
dispersion
17.Violet light has the ____ wavelengths
a) lowest
b) highest
c) same
d) standard
Correct answer
lowest
18.A convex lens forms a virtual image if the object is
a) at F
b) At infinity
c) below F and 2F
d) below the lens and the principal focus
Correct answer
below the lens and the principal focus
19.The velocity of light is
a) 3x10^8 ms^-1
b) 3x10^8 ms^-1
c) 3x10^8 km s^-1
d) 3x10^-8 km s^-1
Correct answer
3x10^8 ms^-1
20.Mie scattering is responsible for the white appearance of the clouds
a) True
b) False
Correct answer
True