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🇺🇸 OAT (Optometry Admission Test) · flashcards
OAT (Optometry Admission Test) Physics Flashcards
59 question-and-answer cards covering Physics as it is examined in OAT (Optometry Admission Test). 24 of them are printed below, taken from across the deck — no signup, no paywall on the preview.
24 sample cards from the Physics deck
Sampled from the end of the deck, so these are different cards from the ones shown on the syllabus page.
What is the Doppler effect for sound (qualitatively)?
Observed frequency increases when source and observer approach each other and decreases when they move apart, due to compression/stretching of wavelengths.
What conditions produce constructive and destructive interference?
Constructive: path difference = nλ (waves in phase, amplitudes add). Destructive: path difference = (n + ½)λ (waves out of phase, amplitudes cancel).
How is sound intensity level in decibels calculated?
β = 10 log10(I/I0), where I0 = 10⁻¹² W/m² (threshold of hearing). Every 10 dB corresponds to a 10× change in intensity.
What is the restoring force in simple harmonic motion (Hooke's law)?
F = −kx: the restoring force is proportional to displacement and directed opposite to it.
What is the period of a mass on a spring versus a simple pendulum?
Mass-spring: T = 2π√(m/k). Simple pendulum: T = 2π√(L/g) (small-angle approximation).
State Coulomb's law for the force between two point charges.
F = k q1 q2 / r², where k ≈ 8.99×10⁹ N·m²/C². Like charges repel; opposite charges attract.
What is the electric field due to a point charge, and the force on a charge in a field?
E = kq/r² (field of a point charge); F = qE (force on charge q in field E). Field points away from positive, toward negative charges.
Define electric potential (voltage) and relate it to potential energy.
Potential V = U/q = kQ/r for a point charge. Potential energy U = qV. Unit: volt (V = J/C).
State Ohm's law and the formula for electrical power.
V = IR. Power P = IV = I²R = V²/R. Resistance unit: ohm (Ω).
How do resistors combine in series versus in parallel?
Series: R_total = R1 + R2 + … Parallel: 1/R_total = 1/R1 + 1/R2 + … (series resistances add; parallel total is less than the smallest).
How do capacitors combine in series versus parallel, and what is stored energy?
Parallel: C_total = C1 + C2 + … Series: 1/C_total = 1/C1 + 1/C2 + … Energy stored: U = ½CV². Capacitance C = Q/V.
What is the magnetic force on a moving charge and on a current-carrying wire?
On a charge: F = qvB sin θ. On a wire: F = BIL sin θ. Direction given by the right-hand rule.
State Faraday's law of electromagnetic induction and Lenz's law.
Faraday: induced EMF = −dΦ/dt (rate of change of magnetic flux). Lenz: the induced current opposes the change in flux that produced it (the minus sign).
State Snell's law of refraction and define index of refraction.
n1 sin θ1 = n2 sin θ2. Index of refraction n = c/v (speed of light in vacuum divided by speed in the medium); n ≥ 1.
What is the thin lens / mirror equation and the magnification formula?
1/f = 1/do + 1/di. Magnification m = −di/do = hi/ho. Positive di means a real image; negative means virtual.
Distinguish converging and diverging lenses by focal length and image type.
Converging (convex) lens: f > 0, can form real inverted or virtual upright images. Diverging (concave) lens: f < 0, always forms a virtual, upright, reduced image.
What is the condition for total internal reflection and the critical angle?
Occurs when light travels from a higher to a lower index medium at an angle exceeding the critical angle θc, where sin θc = n2/n1 (n1 > n2).
List the SI base units for length, mass, time, current, and temperature.
Length: meter (m); mass: kilogram (kg); time: second (s); electric current: ampere (A); temperature: kelvin (K).
What do the metric prefixes nano, micro, milli, kilo, mega, and giga represent?
nano = 10⁻⁹, micro = 10⁻⁶, milli = 10⁻³, kilo = 10³, mega = 10⁶, giga = 10⁹.
What is the photoelectric effect and the photon energy equation?
Light striking a metal ejects electrons only if photon energy exceeds the work function. Photon energy E = hf = hc/λ, where h = 6.63×10⁻³⁴ J·s.
State the mass-energy equivalence and the basics of radioactive half-life.
E = mc². Half-life is the time for half of a radioactive sample to decay; after n half-lives, the remaining fraction is (½)ⁿ.
What is dimensional analysis and why is it useful in problem solving?
It tracks units through a calculation to check that an equation is consistent and to convert units. If the units of the result are wrong, the setup is wrong.
Compare scalar and vector quantities with examples.
Scalars have magnitude only (e.g., mass, time, speed, energy, temperature). Vectors have magnitude and direction (e.g., displacement, velocity, acceleration, force).
How do you add two perpendicular vectors to find the resultant magnitude and direction?
Magnitude: R = √(Rx² + Ry²) (Pythagorean theorem). Direction: θ = tan⁻¹(Ry/Rx).
What this deck covers
The Physics deck follows the OAT (Optometry Admission Test) Physics syllabus — 5 chapters and 17 topics — so questions land on material that is genuinely examinable rather than trivia around it. That works out to roughly 11.8 cards per chapter.
Answers are written to be recallable, not just readable — averaging about 119 characters, which is long enough to carry the reasoning and short enough to say out loud.
A deck like this earns its keep on the second and third pass. Read the syllabus first so you know the shape of the subject, then use the cards to find the specific facts that have not stuck.
Physics flashcards FAQ
How many Physics flashcards are in this OAT (Optometry Admission Test) deck?
59 cards. This page previews 24 of them, sampled evenly across the deck so you can judge the difficulty before installing anything.
Are these OAT (Optometry Admission Test) flashcards free?
Yes. The preview here is free to read with no signup, and the full 59-card deck is free inside the Examius app.
What do the Physics cards cover?
They follow the OAT (Optometry Admission Test) Physics syllabus — 5 chapters and 17 topics — so the questions track what is actually examinable.
How should I use these flashcards?
Read the syllabus first so you know the shape of the subject, then drill the deck. Examius schedules each card with spaced repetition, so cards you keep missing come back sooner and ones you know drift further apart.