NEET Physics: Ray Optics — MCQ Test 9

Q6. What is the critical angle for a diamond (\( n = 2.42 \)) to glass (\( n = 1.5 \)) interface?

Q7. A converging beam of light meets a concave lens of focal length \( 25 \, \text{cm} \) at \( 10 \, \text{cm} \) before the convergence point. What is the new convergence distance from the lens?

Q8. A compound microscope has an objective of focal length \( 1 \, \text{cm} \) and eyepiece of focal length \( 5 \, \text{cm} \) with a tube length of \( 15 \, \text{cm} \). What is the magnification at infinity?

Q9. A concave mirror of focal length \( 6 \, \text{cm} \) has an object placed \( 12 \, \text{cm} \) from it. What is the image distance?

Q10. A concave lens of focal length \( 15 \, \text{cm} \) has an object placed \( 30 \, \text{cm} \) from it. What is the image distance?

Q11. A prism of angle \( 60^\circ \) and refractive index \( 1.5 \) produces a minimum deviation of \( 30^\circ \). What is the angle of incidence?

Q12. A ray of light passes from air (\( n = 1 \)) to glass (\( n = 1.5 \)) at an angle of incidence of \( 40^\circ \). What is the angle of refraction?

Q13. A convex lens (\( f = 30 \, \text{cm} \)) and a concave lens (\( f = 60 \, \text{cm} \)) are in contact. What is the effective focal length?

Q14. What is the significance of the critical angle in the context of total internal reflection?

Q15. What is the critical angle for a glass (\( n = 1.5 \)) to water (\( n = 1.33 \)) interface?

NEET Physics — Ray Optics

Free MCQ Test 9 of 20

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Medium

A simple microscope with a focal length of \( 8 \, \text{cm} \) forms an image at infinity. What is the magnification?

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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 Microscope, Infinity, Magnification, Telescope, Objective, and Eyepiece.

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 simple microscope with a focal length of \( 8 \, \text{cm} \) forms an image at infinity. What is the magnification?

  • A. 2.5
  • B. 3.1
  • C. 3.5
  • D. 4

Q2. A telescope has an objective of focal length \( 140 \, \text{cm} \) and an eyepiece of focal length \( 7 \, \text{cm} \). What is its magnifying power?

  • A. 15
  • B. 18
  • C. 20
  • D. 25

Q3. What is the primary optical phenomenon responsible for the mirage effect observed on hot roads?

  • A. Total internal reflection
  • B. Dispersion of light
  • C. Refraction without reflection
  • D. Reflection from the road surface

Q4. A lens has a power of \( +4 \, \text{D} \). What is its focal length in centimeters?

  • A. 20 cm
  • B. 22 cm
  • C. 25 cm
  • D. 30 cm

Q5. A converging beam meets a concave lens (\( f = 20 \, \text{cm} \)) \( 8 \, \text{cm} \) before the convergence point. What is the new image distance?

  • A. 5 cm
  • B. 5.5 cm
  • C. 6 cm
  • D. 5.7 cm

+ 10 more questions in the actual test

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