Quiz for Polarization

Q1: Polarization is a phenomenon which proves that:

A. Light is a longitudinal wave B. Light is a scalar wave C. Light is a transverse wave D. Light has a constant velocity

Q2: Which instrument is used to produce polarized light?

A. Prism B. Polaroid C. Concave mirror D. Plane mirror

Q3: Brewster’s angle is the angle of incidence at which:

A. Reflected and refracted rays are perpendicular B. Refracted ray is fully polarized C. Reflected ray is fully polarized D. All of the above

Q4: Malus’ Law is related to:

A. Refraction of light B. Interference of light C. Polarization of light D. Scattering of light

Q5: If unpolarized light of intensity I passes through a polaroid, the intensity of transmitted light is:

A. I B. I/2 C. 2I D. I²

Q6: What is the nature of ordinary light emitted from a bulb?

A. Plane polarized B. Circularly polarized C. Unpolarized D. Elliptically polarized

Q7: Which of the following cannot be polarized?

A. Microwaves B. X-rays C. Gamma rays D. Sound waves

Q8: Which type of wave shows polarization?

A. Longitudinal B. Transverse C. Both A and B D. Neither A nor B

Q9: What happens when polarized light passes through a second polaroid at 90° angle?

A. Intensity doubles B. Intensity halves C. No light passes D. Light becomes circularly polarized

Q10: If analyzer is at 60° to polarizer, transmitted intensity is:

A. I B. I/2 C. I/4 D. I×cos²(60°)

Q11: The angle of polarization and angle of refraction are related as:

A. Sum is 45° B. Equal angles C. Sum is 90° D. Difference is 30°

Q12: Polaroids are based on which principle?

A. Diffraction B. Reflection C. Selective absorption D. Interference

Q13: Which physical quantity changes when light is polarized?

A. Wavelength B. Frequency C. Direction of vibration D. Speed

Q14: Which condition is necessary for polarization by reflection?

A. Oblique incidence B. Normal incidence C. Circular polarization D. None of the above

Q15: Which of the following is used to detect polarized light?

A. Concave lens B. Analyzer C. Convex mirror D. Prism

Q16: Which of these can cause polarization of light?

A. Reflection B. Refraction C. Scattering D. All of these

Q17: If polarizer and analyzer are parallel, what happens?

A. No light passes B. Half intensity passes C. Maximum intensity passes D. Light becomes unpolarized

Q18: What is the value of Brewster’s angle for glass (n=1.5)?

A. 45° B. 56.3° C. 30° D. 90°

Q19: What is the nature of light emerging from a Polaroid?

A. Partially polarized B. Completely unpolarized C. Linearly polarized D. Circularly polarized