Which statement is true? a. the wavelengths that makeup the electromagnetic spectrum each have the same amount of energy. b. photons reflected by pigments in leaves are used by leaves to carry out photosynthesis. c. photons are units of light that travel from the sun to leaves in the same way that particles travel travel through space. d. human beings can see only a small fraction of the wavelengths that make up electromagnetic spectrum.

D.

It is estimated that the human eye can only see 390 - 690 nanometers of a electromagnetic spectrum.

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BioTeacher101

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.