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RAY OPTICS AND OPTICAL INSTRUMENTS-9 Quiz

Dear Readers,

JEE Advanced Physics Syllabus can be referred by the IIT aspirants to get a detailed list of all topics that are important in cracking the entrance examination. JEE Advanced syllabus for Physics has been designed in such a way that it offers very practical and application-based learning to further make it easier for students to understand every concept or topic by correlating it with day-to-day experiences. In comparison to the other two subjects, the syllabus of JEE Advanced for physics is developed in such a way so as to test the deep understanding and application of concepts..

Q1. In figure, ABC is the cross section of a right-angled prism and ACDE is the cross section of a glass slab. The value of θ so that light incident normally on the face AB deos not cross the face AC is (given sin^(-1)⁡(3/5)=37°)
  •  θ≤37°
  •  θ less than 37°
  •  θ≤53°
  •  θ less than 53°
Solution

Q2.A plano-concave lens is placed on a paper on which a flower is drawn. How far above its actual position does the flower appear to be?
  •  10 cm
  •  15 cm
  •  50 cm
  •  None of these
Solution

Q3.  A ray of light travelling in water is incident on its surface open to air. The angle of incidence isθ, which is less than the critical angle. Then there will be
  •   Only a reflected ray and no reflected ray
  •  Only a reflected ray and no reflected ray
  •  A reflected ray and a refracted ray and the angle between then would be less than 108° - 2θ
  •  A reflected ray and a refracted ray and the angle between then would be greater than 108° - 2θ
Solution

Q4. In the figure shown, a point object O is placed in air. A spherical boundary separates two media. AB is the principal axis. The refractive index above AB is 1.6 and below AB is 2.0. The separation between the images formed due to refraction at the spherical surface is
  •  12 m
  •  20 m
  •  14 m
  •  10 m
Solution


Use refraction formulae separately; that is for air and μ=1.6; and for air and μ=2.0 and positions of the two images
Q5. An object is placed at a distance of 15 cm from a convex lens of focal length 10 cm. On the other side of the lens, a convex mirror is placed at its focus such that the image formed by the combination coincides with the object itself. The focal length of the convex mirror is
  •  20 cm
  •  10 cm
  •  15 cm
  •  30 cm
Solution


Q6. In figure, find the total magnification after two successive reflections first on M_1 and then on M_2
  •  +1
  •  -2
  • +2
  •  -1
Solution


Q7. When light is refracted from air into glass
  •  Its wavelength and frequency both increase
  •  Its wavelength increases but frequency remains unchanged
  •  Its wavelength decreases but frequency remains unchanged
  •  Its wavelength and frequency both decrease
Solution
Its wavelength decreases but frequency remains unchanged

Q8. A circular beam of light of diameter d=2 cm falls on a plane surface of glass. The angle of incidence is 60° and refractive index of glass is μ=3/2. The diameter of the refracted beam is
  •  4.00 cm
  •  T3.0 cm
  •  3.26 cm
  •  2.52 cm
Solution

Q9.An object is placed 30 cm to the left of a diverging lens whose focal length is of magnitude 20 cm. Which one of the following correctly states the nature and position of the virtual image formed?
  •  Inverted, enlarged 60 cm to the right
  •  Erect, diminished 12 cm to the left
  •  Inverted, enlarged 60 cm to the left
  •  Erect, diminished 12 cm to the right
Solution

Q10. What should be the value of distance d so that final image is formed on the object itself. (Focal lengths of the lenses are written on the lenses)
  •  10 cm
  •  20 cm
  •  5 cm
  • None of these
Solution
10 cm

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