select the correct answer. which phenomenon related to light allows scientists to measure the distance…

select the correct answer. which phenomenon related to light allows scientists to measure the distance between a star and earth? a. dark patches appear in the electromagnetic spectrum emitted by stars. b. light waves spread out as they move farther from their source. c. stars have different colors based on their temperature. d. stars have unique elements that make up their atmospheres.

select the correct answer. which phenomenon related to light allows scientists to measure the distance between a star and earth? a. dark patches appear in the electromagnetic spectrum emitted by stars. b. light waves spread out as they move farther from their source. c. stars have different colors based on their temperature. d. stars have unique elements that make up their atmospheres.

Answer

Answer:

B. Light waves spread out as they move farther from their source.

Brief Explanations:

The phenomenon of light - wave spreading (known as the inverse - square law) is used in techniques like standard candles to measure star distances. As light travels from a star to Earth, its intensity decreases based on how far it has traveled. This relationship helps in calculating the distance between the star and Earth. Options A, C, and D are related to other aspects of stars such as their spectra, temperature, and composition, not distance measurement via light - wave behavior.