Which of the following is the assumption of the Ancient Greeks on the nature and identity of light?

• Light consists of tiny particles.

• Light is made up of waves similar to that of water waves.

• Light is made up of particles that travels through

  space on a straight line.

• Light is propagated in space as electromagnetic waves.

Who among the following scientists made the theoretical prediction that electromagnetic waves travel through a vacuum at the speed of light?

• Heinrich Hertz

• James Clerk Maxwell

• Michael Faraday

• Thomas Young

Which of the following is Sir Isaac Newton’s theory that explains light as a particle?

• Wave Theory

• Quantum Theory

• Electromagnetic Wave Theory

• Corpuscular Theory

Who among the following scientists first built and operated devices that could emit and detect man‑made electromagnetic radiation?

• Michael Faraday

• Andrei Marie Ampere

• Heinrich Hertz

• James Clerk Maxwell

Who were the proponents of the quantum theory of light?

• James Clerk Maxwell and Heinrich Hertz

• Albert Einstein and Max Planck

• Michael Faraday and Andrei Marie Ampere

• Sir Isaac Newton and Christian Huygens

The wave‑particle duality of light means that, in the same experiment:

• light will act both like a wave and like a particle.

• light will not act like either a wave or a particle.

• light will act either like a wave or like a particle.

• light always exists as two waves or as two particles.

The electric field, E, in an electromagnetic wave is oriented in what direction with respect to its associated magnetic field, B?

• E parallel to B

• E anti-parallel to B

• E at a 45° angle to B

• E perpendicular to B

Of the various types of electromagnetic radiation, which is the least penetrating?

• radio waves

• microwaves

• x-rays

• gamma rays

In order to keep its food hot, a restaurant will place it under which type of lamp?

• x-ray

• infrared

• ultraviolet

• visible light

Glass panes are opaque to a certain type of radiation, which passes through quartz. What type of radiation is it? This radiation is important in ozone layer reactions.

• x-ray

• microwave

• gamma

• ultraviolet