Which of the following statements is FALSE?

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Question: Which of the following statements is FALSE?

Option 1: 'Light is an electromagnetic wave.' This is a foundational statement in classical optics: light behaves as an electromagnetic wave described by Maxwell’s equations, with oscillating electric and magnetic fields propagating through space. This is true in the classical sense and aligns with many experiments like interference and diffraction.

Option 2: 'There is a white light.' In everyday experience, we perceive white light when multiple wavelengths (colors) are combined, such as sunlight. While white light isn’t a single pure wavelength, the statement that white light exists is accurate, because white light is a real phenomenon resulting from a blend of colors.

Option 3: 'Light can behave either a wave or a particle.' This captures the core of quantum mechanics: light exhibits wave-like properties (interference, diffraction) and particle-like properties (photons, the photoelectric effect). The dual nature is well established, so this is true.

Option 4: 'Light can travel in vacuum.' Light does not require a medium to propagate; in a vacuum, electromagnetic waves travel at the speed of light without needing matter. This statement is true.

In examining these options, each of the first, third, and fourth statements corresponds to well-supported concepts in physics. The second statement, while commonly accepted as true in everyday language, rests on the idea that white light is a mixture of colors rather than a single wavelength; nonetheless, white light does exist as a perceptible phenomenon. If a question marks one option as false, the nuance in Option 2 can be the point of contention depending on how the statement is interpreted in a particular curriculum. The other options align with standard physical understanding.

COS SPR 25 class 2 Jan 23 Ch5: Light and Matter (Due Jan 26)

Which of the following statements is FALSE?

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