Kumar Physics Classes
NEET PHYSICS TUTOR DOUBT 66
Dear Students, this NEET Physics assessment paper is based on the second major half of Class 12 Physics: Ray Optics and Optical Instruments, Wave Optics, Dual Nature of Matter and Radiation, Atoms and Nuclei, and Semiconductor Devices. These chapters are extremely important for NEET, CBSE, IIT-JEE and board-level Physics preparation because they test ray diagrams, sign convention, interference, diffraction, photoelectric effect, atomic models, nuclear physics and semiconductor logic.
This paper has been prepared in a systematic, exam-oriented way by a Physics Tutor in Sadashivanagar – Bengaluru. It is designed to improve concept clarity, diagram understanding, numerical accuracy, speed, confidence and exam discipline.
Kumar Physics Classes
Phone / WhatsApp: +91 9958461445
Email: kumarsirphysics@gmail.com
Website: kumarphysicsclasses.com
Important Formula Revision for NEET Physics: Class 12 Optics and Modern Physics
Before starting this paper, revise the important formulas from Ray Optics, Wave Optics, Dual Nature, Atoms, Nuclei and Semiconductor Devices. NEET Physics often checks whether a student can select the correct formula, understand the condition in which it applies, draw the right diagram, use sign convention correctly, and solve conceptual questions with confidence. This formula bank is added to help students revise quickly before attempting the paper.
Mirror Magnification
m = -v/uused in image-size questionsLens Formula
1/f = 1/v - 1/uused in thin lens numericalsLens Magnification
m = v/uused in lens image questionsPower of Lens
P = 1/fwhere f is in metreLens Maker Formula
1/f = (μ - 1)(1/R1 - 1/R2)used in lens design questionsSpherical Refraction
μ2/v - μ1/u = (μ2 - μ1)/Rused at curved refracting surfacesSnell's Law
μ1sin i = μ2sin rused in refraction questionsRefractive Index
μ = c/vused in speed of light questionsCritical Angle
sin C = 1/μused in total internal reflectionApparent Depth
apparent depth = real depth/μused in water/glass slab questionsPrism Formula
δ = i + e - Aused in prism deviation questionsMinimum Deviation
μ = sin[(A + δm)/2]/sin(A/2)used in prism numericalsSimple Microscope
M = 1 + D/fused for magnifying powerCompound Microscope
M = (L/fo)(D/fe)used in optical instrumentsAstronomical Telescope
M = fo/feused in telescope questionsYDSE Path Difference
Δx = yd/Dused in interference questionsFringe Width
β = λD/dused in Young's double slit experimentBright Fringe
path difference = nλcondition for constructive interferenceDark Fringe
path difference = (2n - 1)λ/2condition for destructive interferencePhase Difference
Δφ = 2πΔx/λused in wave optics reasoningInterference Intensity
I = I1 + I2 + 2√(I1I2)cosφused in maxima/minima questionsEqual Intensities
I = 4I0cos2(φ/2)used when the two sources are identicalSingle Slit Minima
a sinθ = nλused in diffraction questionsCentral Maximum Width
2λD/aused in single slit diffractionBrewster's Law
μ = tan iBused in polarisationMalus Law
I = I0cos2θused for analyser-polariser systemsPhoton Energy
E = hνused in photon energy questionsPhoton Momentum
p = h/λused in dual nature questionsPhotoelectric Equation
hν = φ0 + Kmaxused in photoelectric effect numericalsMaximum Kinetic Energy
Kmax = hν - φ0used for emitted electronsStopping Potential
eV0 = Kmaxused in stopping potential graphsThreshold Frequency
ν0 = φ0/hused to check photoemissionWork Function
φ0 = hν0used in photoelectric questionsde Broglie Wavelength
λ = h/pused in matter-wave problemsElectron Wavelength
λ = h/√(2meV)used for accelerated electronsVoltage Relation
λ ∝ 1/√Vused in Davisson-Germer problemsBohr Radius
rn = n2a0/Zused in atomic radius questionsBohr Velocity
vn = Zαc/nused in hydrogen-like atomsBohr Energy
En = -13.6Z2/n2 eVused in atomic transition problemsHydrogen Radius
rn = n2r1used for H atom orbitsEnergy Difference
ΔE = E2 - E1used in transition energyTransition Photon
hν = Ei - Efused in spectral linesRydberg Formula
1/λ = RZ2(1/n12 - 1/n22)used in spectral seriesIonisation Energy
13.6 eVfor the hydrogen ground stateExcitation Energy
Efinal - Einitialused in atomic excitationNuclear Radius
R = R0A1/3used in nuclei questionsMass Defect
Δm = Zmp + (A - Z)mn - Mused in binding energyBinding Energy
BE = Δmc2used in nuclear energy questionsBinding Per Nucleon
BE/Aused in stability comparisonRadioactive Decay
N = N0e-λtused in nuclear decay questionsActivity
A = λNused in activity problemsHalf-Life
T1/2 = 0.693/λused in decay numericalsMean Life
τ = 1/λused in average life questionsHalf-Life and Mean Life
T1/2 = 0.693τused in conversion questionsQ-Value
Q = (mass defect)c2used in nuclear reactionsConductivity
σ = neμe + peμhused in semiconductorsDiode Equation Idea
I = I0(eV/ηVT - 1)used conceptually for diodesRectifier Efficiency
DC output / AC inputused in rectifier questionsLogic NOT
Y = Aused in semiconductor logic gatesLogic AND
Y = A · Bused in logic gate questionsLogic OR
Y = A + Bused in logic gate questionsNAND Gate
Y = A · Bbar covers the complete expressionNOR Gate
Y = A + Bbar covers the complete expressionZener Regulation
Vout ≈ VZused in voltage regulationTransistor Current
IE = IB + ICused in transistor circuitsCommon Emitter Gain
β = IC/IBused in amplifier questionsCommon Base Gain
α = IC/IEused in transistor questionsStrengthen Class 12 Physics for NEET
The second half of Class 12 Physics can become highly scoring if the concepts are clear. Ray Optics, Wave Optics, Dual Nature, Atoms, Nuclei and Semiconductor Devices are not chapters for blind memorisation. They require diagram practice, sign convention clarity, wave reasoning, formula application and conceptual confidence.
Treat this paper like a serious self-test. Attempt every question carefully and do not open the solution immediately. Think first, calculate properly, and then compare your answer with the official solution. Every mistake should become a learning opportunity.
If a student living in Sadashivanagar – Bengaluru is searching for a Physics Tutor for NEET, CBSE, IIT-JEE, IB, ICSE, IGCSE or AP Physics, they may contact Kumar Sir for one-to-one guidance.
Why Strong Physics Preparation Is Now More Important Than Ever
NEET Physics is becoming more conceptual and competitive. Students must build conceptual clarity, calculation accuracy, diagram accuracy, speed and the ability to solve unfamiliar problems. Memorising formulas is not enough; students must understand when, where and how to apply them.
A serious NEET Physics Tutor in Bengaluru can help students connect formulas with diagrams, logic and exam-level application.
Important Message for NEET 2027, 2028, 2029, 2030 and Future Aspirants
Future NEET aspirants must prepare seriously and strengthen their Class 12 Physics foundation early. Question patterns may continue to become more application-based and concept-driven. Students should practise papers under timed conditions, revise formulas regularly, analyse mistakes honestly and strengthen weak chapters before they become scoring barriers.
Why Study Physics with Kumar Sir?
Kumar Sir provides personalised one-to-one online Physics classes. He explains each concept step by step, clears doubts properly and teaches difficult topics in a simple, exam-oriented manner. His teaching is useful for NEET, CBSE, IIT-JEE, IB, ICSE, IGCSE, AP Physics and other serious academic or competitive exams. He focuses on conceptual clarity, numerical practice, diagram practice, revision and confidence building. If students are struggling with Optics, Modern Physics, Semiconductors or any Class 12 Physics chapter, Kumar Sir can guide them personally as a One-to-one Physics Tutor in Bengaluru.
Promotional Contact
If you are searching for a Physics Tutor in Sadashivanagar – Bengaluru, a Physics Tutor in Bengaluru, or a NEET Physics Tutor in Bengaluru, and you are unable to solve these questions properly, contact Kumar Sir for one-to-one online Physics classes.
This Class 12 second-half paper has been prepared in the style of a serious guided assessment by a Physics Tutor for Ray Optics, Physics Tutor for Wave Optics and Physics Tutor for Modern Physics. Students should solve it sincerely for best results.
Question Index
Final Result
Correct Answer: +4 Wrong Answer: -1 Unattempted: 0
Kumar Physics Classes
Phone / WhatsApp: +91 9958461445
Email: kumarsirphysics@gmail.com
Website: kumarphysicsclasses.com