MATRIX SCIENCE ACADEMY

MHT-CET-XI - New Syllabus (MH) 2024

Time : 60 Min Phy : 09 Optics Marks : 50

01) Sir C. V. Raman was awarded Noble prize for 09) Monochromatic light of wavelength 6000 Ǻ
his work concerned with _________ phenomenon of travels through glass of refractive index 3/2. Find
radiation. the distance travelled by the wave in 1 pico second.
A) Scattering B) Diffraction A) 400  m B) 100  m
C) Polarisation D) Interference C) 300  m D) 200  m

02) A ray of light passes from glass (refractive 10) Angle subtended at the eye by the sun is 0.50.
index = 1.5) to water of refractive index = 1.33. What is the diameter of the image formed by
What is the value of the critical angle of glass? convex lens of focal length 25 cm?
2  8 25
A) sin1   B) sin1 
3  9  A) 12.5 cm B)
36
mm
 
8 5 25
C) sin1   D) sin1   C) 12.5 mm D) mm
36
9 7
11) What is the critical angle of incidence for light
03) Find the minimum distance between an object travelling from medium A to B when the speed of
and its real image formed by convex lens. light in medium A is 2  108 m/s and that in
A) 4 f B) 0.5 f medium B is 2.4  108 m/s?
C) 0.4 f D) 2.5 f
3 5
A) Sin1   B) sin1  
04) A prism of certain angle deviates the red and 4 6
blue rays by 80 and 120 respectively . Another 2  5 
C) Sin1   D) Sin1  
prism of the same angle deviates the red and blue 3  12 
rays by 100 and 140 respectively. The prisms are
small angled and made of different materials. The 12) A ray of light from a denser medium strikes a
dispersive powers of the materials of the prism are rarer medium at an angle of incidence i. Find the
in ______ ratio. critical angle if the reflected and refracted rays are
A) 9 : 11 B) 11 : 9 mutually perpendicular to each other.
C) 6 : 5 D) 5 : 6 A) sin-1 (i) B) sin-1 (tan i)
C) sin (90-i)
-1 D) cot-1 (tan i)
05) What are Conjugate foci?
A) Two lines B) Two point 13) If the angle of incidence and angle of refraction
C) Two planes D) Two curved surfaces at the first refracting surface are 45º & 30º
respectively. What is the refractive index of the
06) Due to ___, the overhead sun is of normal size material of the prism then?
at noon. A) 1.5 B) 1.414
A) diffraction of light 1
C) 2 D)
B) reflection of light through atmosphere 2
C) polarization of light
D) normal incidence of light through atmosphere 14) A thin convex lens of R.I. 1.5 has a power +5
for which angle of refraction is zero diopter. Its focal length becomes 100 cm and a acts
as divergent less, when immersed in a liquid of R.I.
07) If concave and convex lens of focal lengths 50  . Find the value of  .
cm and 40 cm respectively are combined together. A) 0.66 B) 0.36
What is the resultant power of the combination? C) 1.66 D) 1.36
A) -10 diopter B) 10 diopter
C) 90 diopter D) -0.5 diopter 15) A light ray of certain frequency takes different
times to travel through the same distance in two
08) A convex driving mirror of focal length 40 cm is different media which are in the ratio 3:5. The
fixed to a car. A second car is 12m away from the relative refractive index will be:
first car. Find the position of second car in the 5 5
mirror. A) B)
2 3
A) 50 m B) 40 m
C) 30 m D) 20 m 25
C) D) 1:2
9

JEE-MAIN, MHT-CET, NEET/AIPMT, MHT-CET-XI - New Syllabus (MH)

 MATRIX SCIENCE ACADEMY

16) Through a simple microscope, an object is seen A) 100 cm B) 50 cm

first in red light and then in blue light. What is the C) 150 cm D) 25 cm
effect on its magnifying power, due to this change
from red to blue light? 23) Light takes t1 sec to travel a distance x cm in
A) M.P. decreases vacuum and takes t2 sec to travel 10x cm in a
B) M.P. does not change medium. Find the critical angle corresponding to
C) M.P. increases the media.
D) May increase or decrease depending upon the A) sin1  t1 / t2  B) sin1  t2 /10t1 
intensity of incident light
C) sin1 10t1 / t2  D) sin1  t1 /10t2 
17) Two thin converging lenses of focal lengths
0.15 m and 0.30 m are held in contact with each 24) Conjugate foci method is used to determine:
other. What are the focal power (P) and focal length A) Object and image distance
(f) of combination? B) Focal length of lens
100 C) Magnifying power of lens
A) P  D,f  0.15m
15 D) Distance between the two virtual sources
100
B) P  D,f  0.45m 25) A monochromatic ray of light is incident
45
normally on one of the faces of a prism of refracting
C) P=2D, f=0.5 m
D) P=10D, f=0.1 m angle 30 and refractive index 2 . Find the angle
of derivation of the ray.
18) A plane mirror is placed along the x-axis facing A) 150 B) 12.50
negative y-axis. The mirror is fixed. An object is C) 22.5 0 D) 100
moving with a velocity of 3i  4 j in front of the
26) A ray of light of frequency 5  1014Hz is passed
plane mirror. The relative velocity of image with
through a liquid., what will be the refractive index
respect to the object is
of the liquid if the wavelength of light in the liquid
is 450 nm?
A) 1.8 B) 1.33
C) 1.25 D) 1.5

27) The critical angle for total internal reflection,

from a medium to vacuum is 300. Find the velocity
of light in the medium.
2
A) 2  108 m/s B)  108 m /s
5
A) 8 j B) 8 j
3
C) 6i D) 3i  4 j C) 1.5  108 m/s D)  108 m / s
4
19) Due to ___, we get the sensation of light colour 28) A concave mirror gives an image three times as
and intensity. large as the object placed at a distance of 20 cm
A) lens B) retina from it. For the image to be real, what should be
C) cornea D) pupil the focal length?
A) 30 cm B) 20 cm
20) A luminous point object is placed at a distance
C) 15 cm D) 10 cm
of 20 cm, from the pole of a convex spherical
surface of glass. The radius of the curvature of the
29) When a ray going from _____, total internal
convex surface is 25 cm and the R.I. of the glass is
reflection cannot be obtained.
1.5. Find the distance of the image from its pole.
A) glass to air B) water to air
A) v=30 cm in air B) v=20 cm in glass
C) water to glass D) glass to water
C) v=30 cm is glass D) v=40 cm in glass

21) Find the converted form of mirror equation. 30) An astronomical telescope in normal
1 1 1 1 2 1 adjustment receives light from a distant source (S).
A)   B)   The tube length is now slightly decreased. Then
R v u v R u what will happen?
2 4 1 1 1 1 A) No image will be formed
C)   D)  
v u f v u f B) A virtual image of S will be formed at a finite
distance
22) From a point source a light falls on a spherical C) A small real image of S will be formed behind
glass surface the eyepiece, close to it
(  1.5 and radius of curvature  10 cm). The D) A large, real image of S will be formed behind
distance between point source and glass surface is the eyepiece, far away from it
50 cm. What is the position of image?

JEE-MAIN, MHT-CET, NEET/AIPMT, MHT-CET-XI - New Syllabus (MH)

 MATRIX SCIENCE ACADEMY

31) The refractive index of the core material in an A) fV<fR and FV<FR B) fV<fR and FV>FR
optical fibre is C) fV>fR and FV<FR D) fV>fR and FV>FR
A) less than that of the cladding material
B) more than that of the cladding material 40) The angular dispersion produced by a prism of
C) equal to R.I of the cladding material angle 15º which has refractive indices 1.627 for red
D) negligible as compared to that of the cladding and 1.648 for violet colour is:
material A) 2º B) 0.21º
C) 1º D) 0.315º
32) While reading a newspaper, one cannot see his
image in the paper as 41) A reflecting type of telescope has a large
A) there is diffused reflection spherical mirror for its objective with radius of
B) there is regular reflection curvature equal to 80 cm. _____ is the magnifying
C) there is no reflection at all power of telescope, if eye-piece used has a focal
D) the newspaper absorbs the light incident on it length of 1.6 cm.
33) A mark placed on the surface of a sphere is A) - 75 B) - 100
viewed through glass from a position directly C) + 50 D) + 25
opposite. If the diameter of the sphere is
42) How the internal image is formed in compound
10 cm and refractive index of glass is 1.5. What will
microscope?
be the position of the image?
A) Virtual erect and reduced
A) -20 cm B) 40 cm
B) Virtual erect and magnified
C) -10 cm D) 30 cm
C) Real erect and magnified
34) Why danger signals are red? D) Real inverted and magnified
A) Because red colour is least scattered
B) Because red colour has smaller wavelength 43) Find the refractive index for completely
C) Because red colour has larger frequency transparent material medium to be invisible.
D) Because red colour is maximum scattered A) It is unity
B) It is more than unity
35) An object is placed at 50 cm in front of a C) It is equal to 1.5
concave mirror of focal length 25 cm. Find the D) It is less than unity
nature of the image produced by the mirror.
A) Real, inverted and smaller in size 44) Four convergent lenses have focal lengths 100
B) Real and erect and of the same size cm, 10 cm, 4 cm and 0.3 cm. We must select the
C) Real, inverted and of the same size lenses of focal lengths ____ for preparing a
D) Virtual and inverted and bigger in size telescope with maximum possible magnifying
power.
36) The power of a biconvex lens is 10 dioptre and A) 100 cm, 4 cm B) 10 cm, 4 cm
the radius of curvature of each surface is 10 cm. C) 100 cm, 10 cm D) 100 cm, 0.3 cm
Then find the refractive index of the material of the
lens. 45) Find the magnifying power of a simple
3 9 microscope of focal length 5 cm, if the image is
A) B)
2 8 formed at the distance of distinct vision.
5 4 A) 7 B) 6
C) D) C) 5 D) 4
3 3
37) The bottom of swimming pool appears to be 46) If the radius of curvature of the convex surface
less deep than the actual one due to is 10 cm, then what is the refractive index of the
A) scattering of light material of a plano convex lens of focal length 30
B) interference of light cm?
C) refraction of light 2 6
A) B)
D) differection of light 3 5
38) The image set up by the mirrors used at home 7 4
C) D)
is 4 3
A) exactly same in size as that of the object without
any change 47) A double convex glass lens has a refractive
B) smaller in size than the object index 1.55, with both faces having the same radius
C) exactly same in size but with lateral inversion of curvature. What should be the radius of
D) bigger in size than the object curvature of the lens, to make the focal length of
the lens to be 30 cm?
39) If fV and fR are the focal lengths of a convex A) 44 cm
lens for violet and red colours respectively and for B) 33 cm
the concave lens, FV and FR are the focal lengths C) 22 cm
for violet and red colours respectively, then we D) 11 cm
have

JEE-MAIN, MHT-CET, NEET/AIPMT, MHT-CET-XI - New Syllabus (MH)

 MATRIX SCIENCE ACADEMY

48) The sun looks reddish at the time of sunrise or

sunset because:
A) Of the scattering of light
B) The sun is hottest at these times
C) The sun is coldest at these times
D) Of the effects of reflection and refraction

49) A microscope is focused on a coin lying at the

bottom of beaker. The microscope is now raised up
by 1 cm. Find out the depth at which water should
be poured into the beaker so that coin is again
focused? (  w= 4/3):
A) 4 cm B) 1 cm
4
C) 3 cm D) cm
3

50) The distance of the human eye-lens from the

retina is x. For a normal eye, find the maximum
focal length of the eye-lens.
A) greater than x B) less than x
C) x D) x/2

JEE-MAIN, MHT-CET, NEET/AIPMT, MHT-CET-XI - New Syllabus (MH)