What is the critical angle for total internal reflection when light travels from water () into air ()?
Answer and explanation
Correct answer: C.
- Step 1: Apply Snell's law at the critical boundary where refraction angle is : .
- Step 2: Substitute and : (which corresponds to ).
Answer
.
Why not the others: '1.33' is greater than 1, which cannot be a sine value; '0.50' is ; '0' implies grazing emergence along the normal.
Practise more Electromagnetism, Quantum Physics, Organic Mechanisms and Kinetics.
Free questions with an explanation for every one, and full timed Saudi Secondary School Certificate mock tests.
More Electromagnetism, Quantum Physics, Organic Mechanisms and Kinetics questions
- According to Lenz's law, what is the direction of an induced electric current in a closed conducting loop?
- What is the de Broglie wavelength of an electron of mass moving with non-relativistic velocity ?
- A flywheel has a moment of inertia of . What torque is required to produce an angular acceleration of…
- What type of radioactive decay results in an atomic nucleus increasing its atomic number by 1 while keeping its mass number unchange…
- What is the product formed by the acid-catalyzed hydration of propene ()?
- What is the rate law for an elementary bimolecular reaction ?