NEET Physics: Ray Optics — MCQ Test 5

Q6. An object of height \( 2 \, \text{cm} \) is placed \( 10 \, \text{cm} \) from a concave mirror of focal length \( 5 \, \text{cm} \). What is the height of the image?

Q7. A prism of angle \( 30^\circ \) has a minimum deviation of \( 20^\circ \). What is the refractive index?

Q8. Why does a convex lens fail to form a sharp image when used with white light unless corrected?

Q9. A double convex lens of refractive index \( 1.5 \) has radii of curvature \( 40 \, \text{cm} \) and \( -40 \, \text{cm} \). What is its focal length?

Q10. A double convex lens of refractive index \( 1.55 \) has radii of curvature \( 30 \, \text{cm} \) and \( -30 \, \text{cm} \). What is its focal length?

Q11. A converging beam meets a convex lens (\( f = 12 \, \text{cm} \)) \( 6 \, \text{cm} \) before the convergence point. What is the new image distance?

Q12. A ray of light passes from air (\( n = 1 \)) to water (\( n = 1.33 \)) at an angle of incidence of \( 50^\circ \). What is the angle of refraction?

Q13. A convex lens (\( f = 50 \, \text{cm} \)) and a concave lens (\( f = 25 \, \text{cm} \)) are in contact. What is the effective focal length?

Q14. An object is placed \( 12 \, \text{cm} \) from a concave mirror of focal length \( 6 \, \text{cm} \). What is the image distance?

Q15. A simple microscope with a focal length of \( 5 \, \text{cm} \) forms an image at \( 25 \, \text{cm} \). What is the magnification?

NEET Physics — Ray Optics

Free MCQ Test 5 of 20

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A convex lens of power \( +4 \, \text{D} \) is used. What is its focal length?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Physics preparation, focusing specifically on the chapter Ray Optics. It contains 15 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Incidence, Refraction, Submerged, Refractive, Compound, and Microscope.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. A convex lens of power \( +4 \, \text{D} \) is used. What is its focal length?

  • A. 20 cm
  • B. 25 cm
  • C. 30 cm
  • D. 40 cm

Q2. A ray of light passes from glass (\( n = 1.62 \)) to water (\( n = 1.33 \)) at an angle of incidence of \( 50^\circ \). What is the angle of refraction?

  • A. 60°
  • B. 65°
  • C. 69°
  • D. 75°

Q3. Why does a convex lens submerged in a liquid with the same refractive index as the lens not form an image?

  • A. Due to increased focal length
  • B. Due to light absorption
  • C. Due to dispersion of light
  • D. Due to no refraction at the interfaces

Q4. A compound microscope has an objective of focal length \( 1.5 \, \text{cm} \) and eyepiece of focal length \( 5 \, \text{cm} \) with a tube length of \( 20 \, \text{cm} \). What is the magnification at infinity?

  • A. 60
  • B. 65
  • C. 70
  • D. 67

Q5. In a convex lens submerged in a medium of higher refractive index, what happens to its ability to focus light?

  • A. It focuses light more strongly
  • B. It produces no image
  • C. It behaves as a diverging lens
  • D. It remains unaffected

+ 10 more questions in the actual test

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