Optics is one of the most essential topics in the NEET Physics syllabus. A strong grasp of reflection, refraction, and wave optics can help you score high in the physics section of the NEET exam. This article provides a comprehensive collection of MCQs on optics, along with detailed explanations and solutions. Additionally, we’ll explore how NEET World coaching can enhance your preparation.
🔬 Importance of Optics in NEET Exam
Optics plays a crucial role in the NEET Physics section, contributing 10-15% of the total physics questions. Questions from this topic typically test your conceptual understanding and problem-solving skills. Mastering optics can help boost your overall score in NEET, increasing your chances of securing admission to top medical colleges.
Key reasons why optics is important for NEET:
✅ Frequently asked in NEET Physics paper
✅ Conceptual and application-based questions
✅ High weightage in competitive exams
✅ Direct formula-based questions that can save time
📚 Key Topics in Optics for NEET
1️⃣ Reflection of Light
Reflection occurs when light bounces off a surface. It follows the law of reflection, which states:
✔ Angle of incidence = Angle of reflection
✔ Incident ray, reflected ray, and normal lie in the same plane
Common questions in NEET include:
- Finding the angle of reflection
- Calculating the number of images formed in plane mirrors
2️⃣ Refraction and Lenses
Refraction is the bending of light when it passes from one medium to another. It follows Snell’s Law:n1sini=n2sinrn_1 \sin i = n_2 \sin rn1sini=n2sinr
Lenses play a major role in refraction-based questions. You must be familiar with:
✔ Lens formula (1/f = 1/v – 1/u)
✔ Magnification formula (m = h’/h = v/u)
✔ Power of a lens (P = 100/f in cm)
3️⃣ Total Internal Reflection (TIR)
TIR occurs when light moves from a denser medium to a rarer medium at an angle greater than the critical angle.
Common applications of TIR in NEET questions:
✅ Optical fibers
✅ Diamond sparkle
✅ Mirage and looming effects
4️⃣ Dispersion and Scattering
Dispersion is the splitting of light into its component colors when passing through a prism. Scattering explains phenomena like the blue color of the sky and red sunset.
5️⃣ Wave Optics: Diffraction and Interference
Wave optics covers:
- Young’s Double-Slit Experiment (YDSE)
- Interference patterns
- Diffraction through slits
📝 Top Optics MCQs for NEET
🔹 Basic Level Questions
1. The focal length of a convex lens is 20 cm. What is its power?
A) +5 D
B) -5 D
C) +10 D
D) -10 D
👉 Answer: A) +5 D (Using P = 100/f)
2. Which phenomenon is responsible for the formation of a rainbow?
A) Reflection
B) Refraction
C) Dispersion
D) Diffraction
👉 Answer: C) Dispersion
🔹 Intermediate Level Questions
3. A concave mirror has a focal length of 15 cm. Where should an object be placed to get a real, inverted image of the same size?
A) At 15 cm
B) Beyond 30 cm
C) At 30 cm
D) Between 15 cm and 30 cm
👉 Answer: C) At 30 cm (Object at 2F forms the same-sized image at 2F)
4. The critical angle for light traveling from glass to air is approximately:
A) 30°
B) 42°
C) 60°
D) 90°
👉 Answer: B) 42°
🔹 Advanced Level Questions
5. In Young’s Double-Slit Experiment, if the distance between slits is doubled, the fringe width will:
A) Double
B) Remain unchanged
C) Halve
D) Become four times
👉 Answer: C) Halve (Fringe width is inversely proportional to slit distance)
6. A convex lens of focal length 10 cm is combined with a concave lens of focal length 20 cm. The power of the resulting combination is:
A) +10 D
B) -10 D
C) +5 D
D) -5 D
👉 Answer: C) +5 D (Power = P1 + P2)
⚡ Tips to Solve Optics MCQs Quickly
✅ Memorize important formulas like lens formula, mirror formula, Snell’s law
✅ Practice ray diagrams to understand image formation
✅ Focus on previous year NEET questions
✅ Solve mock tests and time-based quizzes
🚨 Common Mistakes to Avoid in NEET Physics
❌ Misinterpreting sign conventions in lens/mirror formulas
❌ Forgetting the units in power and focal length calculations
❌ Not drawing proper ray diagrams in refraction problems
🏆 Why Choose NEET World for Optics Preparation?
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🎯 Final Thoughts
Mastering optics can significantly boost your NEET score. Practicing high-quality MCQs and getting expert coaching from NEET World can ensure a top rank in NEET.
❓ FAQs on Optics for NEET
1. How many questions from optics appear in NEET?
➡️ Typically 4-5 questions appear in NEET Physics from optics.
2. What is the best way to study optics for NEET?
➡️ Focus on conceptual clarity, ray diagrams, and problem-solving techniques.
3. Is wave optics important for NEET?
➡️ Yes, wave optics questions appear every year in NEET.
4. Can I skip optics in NEET preparation?
➡️ No! Optics is highly scoring and should not be skipped.
5. Where can I get the best coaching for optics in NEET?
➡️ NEET World offers expert coaching for NEET Physics, including optics.
