Question

when a piece of metal is heated to high temperatures, it begins to glow red, and then white, as its temperature increases. does this phenomenon provide evidence for the wave model or the particle model of light? why? a. the particle model, because the metal is emitting packets of light at specific wavelengths b. the wave model, because the wavelengths of emitted radiation keep changing c. the particle model, because the metal is only absorbing radiation of specific frequencies d. the wave model, because the wavelengths of emitted light depend on the metals temperature

Explanation:

• The particle model of light (photons) suggests that light is emitted in discrete packets (photons) with specific energies related to specific wavelengths. When a metal is heated, electrons gain energy and then release it as photons (packets of light) at specific wavelengths corresponding to the energy transitions.
• The wave model does not emphasize discrete packets at specific wavelengths in this context. Options B and D focus on wavelengths changing or depending on temperature in a wave - like continuous sense which is not the key here. Option C is incorrect as the question is about emission not absorption.

Answer:

A. The particle model, because the metal is emitting packets of light at specific wavelengths