## Ray Optics And Optical Instruments Quiz-2

As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background.

Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced.

Q11. A convex lens is placed between object and a screen. The size of object is 3 cm and an image of height 9 cm is obtained on the screen. When the lens is displaced to a new position, what will be the size of image on the screen?
•  2 cm
•  6 cm
•  4 cm
•  1 cm
Solution

Q12.A double convex lens made out of glass (refractive index Î¼=1.5) has both radii of curvature of magnitudes 20 cm. Incident light rays parallel to the axis of this lens will converge at a distance d such that
•  d=10 cm
•  d=20/3 cm
•  d=40 cm
•  d=20 cm
Solution

Q13.  The deviation caused in red, yellow and violet colours for crown glass prism are 2.84°,3.28° and 3.72° respectively. The dispersive power of prism material is
•  0.268
•  0.368
•  0.468
•  0.568
Solution

Q14. A beam of monochromatic blue light of wavelength 4200 â„« in air travels in water (Î¼=4/3). Its wavelength in water will be
•  2800 â„«
•  5600 â„«
•  3150 â„«
•  4000 â„«
Solution

Q15.Refractive index of a medium is Î¼. The incidence angle is twice that of refracting angle. The angle of incidence is
•  cos-1⁡(Î¼/2)
•  sin-1(Î¼/2)
•  2 cos-1⁡(Î¼/2)
•  sin-1Î¼
Solution

Q16. The far point of a myopia eye is at 40 cm. For removing this defect, the power of lens required will be
•  40 D
• -4 D
•  -2.5 D
•  0.25 D
Solution

Q17.An object is puts at a distance of 5 cm from the first focus of a convex lens of focal length 10 cm. If a real image is formed, its distance from the lens will be
•  15 cm
•  20 cm
•  25 cm
•  30 cm
Solution

Q18.A biconvex lens form a real image of an object placed perpendicular to its principal axis. Suppose the radii of curvature of the lens tend to infinity. Then the image would
•  f
•  1/2 f
•  2f
•  1/4 f
Solution

Q19.The solar spectrum during a complete solar eclipse is
•  Continuous
•  Emission line
•  Dark line
•  Dark band
Solution
At the time of solar eclipse light is received from chromosphere. The bright lines appear exactly at the places where dark lines were there. Hence at the time of solar eclipse continuous spectrum is obtained

Q20. In an equilateral prism if incident angle is 45° then minimum deviation is
•  30°
•  60°
•  45°
• 90°
Solution

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