Science Practice Quiz 72

Q1.What phenomenon occurs when light has a tendency to bend around a very small opaque object on its path, rather than traveling in a straight line?

A. Reflection B. Refraction C. Diffraction D. Dispersion

Q2.Which theory of light often becomes inadequate for treating the interaction of light with matter at the beginning of the 20th century?

A. Particle theory B. Wave theory C. Quantum theory D. Ray theory

Q3.The modern quantum theory of light, as described in the text, reconciles which two properties of light?

A. Reflection and refraction B. Straight-line path and bending C. Particle properties and wave nature D. Absorption and emission

Q4.This chapter primarily focuses on studying which phenomena of light using the straight-line propagation of light?

A. Diffraction and dispersion B. Polarization and interference C. Reflection and refraction D. Absorption and scattering

Q5.What kind of surface is mentioned as reflecting most of the light falling on it?

A. A rough surface B. A transparent surface C. A highly polished surface D. A dull surface

Q6.What is the usual indication for the straight-line path of light?

A. A beam of light B. A ray of light C. A wave of light D. A particle of light

Q7.Which of the following optical phenomena is NOT explained by the straight-line treatment of optics using rays?

A. Image formation by mirrors B. Twinkling of stars C. Sharp shadow formation D. Diffraction

Q8.At what point in time did it become known that the wave theory of light often becomes inadequate for treating the interaction of light with matter?

A. During the 19th century B. At the beginning of the 20th century C. In the mid-20th century D. Towards the end of the 20th century

Q9.According to the laws of reflection, what is the relationship between the angle of incidence and the angle of reflection?

A. The angle of incidence is always greater than the angle of reflection. B. The angle of incidence is always less than the angle of reflection. C. The angle of incidence is equal to the angle of reflection. D. The angle of incidence is half of the angle of reflection.

Q10.Where do the incident ray, the normal to the mirror at the point of incidence, and the reflected ray all lie according to the laws of reflection?

A. In different planes B. In the same plane C. In perpendicular planes D. In parallel planes

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Science Practice Quiz 72