NEET Physics: Ray Optics — MCQ Test 4

Q6. What happens to the power of a convex lens when its surrounding medium’s refractive index increases?

Q7. In a prism, what causes the emergent ray to deviate from the incident ray’s path?

Q8. A ray of light passes from air (\( n = 1 \)) to dense flint glass (\( n = 1.62 \)) at an angle of incidence of \( 45^\circ \). What is the angle of refraction?

Q9. A concave lens of focal length \( 18 \, \text{cm} \) has an object placed \( 36 \, \text{cm} \) from it. What is the image distance?

Q10. A compound microscope has an objective of focal length \( 1.5 \, \text{cm} \) and tube length \( 18 \, \text{cm} \). If the eyepiece focal length is \( 6 \, \text{cm} \), what is the total magnification at infinity?

Q11. A prism of refracting angle \( 60^\circ \) in air has a refractive index of \( 1.6 \). What is its angle of minimum deviation?

Q12. A telescope has an objective focal length of \( 150 \, \text{cm} \) and an eyepiece focal length of \( 5 \, \text{cm} \). What is the length of the telescope tube?

Q13. A double convex lens of refractive index \( 1.6 \) has radii of curvature \( 25 \, \text{cm} \) and \( -25 \, \text{cm} \). What is its focal length?

Q14. A compound microscope has an objective of focal length \( 1.2 \, \text{cm} \) and eyepiece of focal length \( 6 \, \text{cm} \) with a tube length of \( 18 \, \text{cm} \). What is the magnification at infinity?

Q15. A compound microscope has an objective of focal length \( 2 \, \text{cm} \) and eyepiece of focal length \( 5 \, \text{cm} \) with a tube length of \( 18 \, \text{cm} \). What is the magnification at infinity?

NEET Physics — Ray Optics

Free MCQ Test 4 of 20

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A simple microscope with a focal length of \( 6 \, \text{cm} \) forms an image at \( 25 \, \text{cm} \). 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, Magnification, Apparent, Critical, Interface, and Infinity.

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 \( 6 \, \text{cm} \) forms an image at \( 25 \, \text{cm} \). What is the magnification?

  • A. 4
  • B. 5.17
  • C. 6
  • D. 7

Q2. A coin lies at the bottom of a water tank (\( n = 1.33 \)) with a depth of \( 13.3 \, \text{cm} \). What is its apparent depth?

  • A. 10 cm
  • B. 12 cm
  • C. 14 cm
  • D. 16 cm

Q3. What is the critical angle for a water (\( n = 1.33 \)) to air interface?

  • A. 49°
  • B. 45°
  • C. 50°
  • D. 55°

Q4. A simple microscope with a focal length of \( 4 \, \text{cm} \) forms an image at infinity. What is the magnification?

  • A. 5
  • B. 6.25
  • C. 7
  • D. 8

Q5. In a compound microscope, what limits the maximum magnification achievable with a single lens?

  • A. Object distance
  • B. Lens thickness
  • C. Image size
  • D. Focal length constraints

+ 10 more questions in the actual test

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