10th Science Chapter-02 Optics Creative Question and Answers Part-02
10th Science Chapter-02 Optics Creative Question and Answers Part-02
01.When light travels from denser to rarer, refracted ray bent away from normal
a) True
b) False
Correct answer
True
02.Device used to see very very small object is ____
a) Simple microscope
b) Compound microscope
c) Telescope
d) Mirror
Correct answer
Compound microscope
03.When white light pass through transparent medium ,it is split in to colours is called dispersion
a) True
b) False
Correct answer
True
04.Light always travels along curved line
a) True
b) False
Correct answer
False
05.When a ray strikes the pole optic center of the concave or convex lens it gets deviated
a) True
b) False
Correct answer
False
06.Red light has highest wavelength and violet has lowest waveleng
a) True
b) False
Correct answer
True
07.In a concave lens when an object is between optic centre and infinity, the image will be
a) at F
b) at 2F
c) between O & F
d) beyond 2F
Correct answer
between O & F
08.To get real inverted and same size of the object is placed in convex lens is ____
a) At F
b) At 2 F
c) below O and F
d) At infinity
Correct answer
At 2 F
09.The human eye forms the image of an object at its
a) Cornea
b) Iris
c) pupil
d) Retina
Correct answer
Retina
10.A convex lens forms a real diminished point sized image at focus. Then the position of the object is at
a) focus
b) infinity
c) at 2f
d) between f and 2f
Correct answer
infinity
11.To get parallel rays after refraction when light pass through focus
a) True
b) False
Correct answer
True
12.The phenomena of light responsible for the working of the human eye is
a) Reflection
b) Refraction
c) Power
d) Accommodation
Correct answer
Refraction
13.Stars and sun are non-luminous objects
a) True
b) False
Correct answer
False
14.The distance measured upward and perpendicular axis is taken as positive
a) True
b) False
Correct answer
False
15.Concave lenses used to correct hypermetropia
a) True
b) False
Correct answer
False
16.The final image formed by the astronomical telescope is 'erectimage'.
a) True
b) False
Correct answer
False
17.For air the refractive index is
a) 1
b) infinity
c) 0
d) -1
Correct answer
1
18.convex lens always forms a real image if the object is situated beyond
a) optic centre
b) centre of curvature
c) focus
d) radius of curvature
Correct answer
focus
19.Cylindrical lens is used to correct
a) Myopia
b) Hypermetropia
c) Presbyopia
d) Astigmatism
Correct answer
Astigmatism
20.The power of lens depends on the focal length of the length
a) True
b) False
Correct answer
True
