Question

question 4 of 33
early experiments with light were understood by explaining the behavior of light in terms of waves. which experimental result required considering the particle nature of light?
a. the polarization of light that passes through special filters
b. the unique spectral lines of the elements
c. the alternating light pattern seen with a diffraction grating
d. the refraction of light that travels through a prism

Explanation:

The photoelectric effect and the observation of unique spectral lines of elements provided evidence for the particle - nature of light. The unique spectral lines could be explained by the quantization of energy levels and the emission or absorption of photons (particles of light). Polarization, diffraction, and refraction are better explained by the wave - nature of light.

Answer:

B. The unique spectral lines of the elements