What is true about energy in an ideal black body?

An ideal black body is defined as a perfect absorber of all incident radiation, meaning it absorbs 100% of radiation that falls on it, regardless of the wavelength. This characteristic is fundamental to the concept of a black body in physics, particularly in the study of thermodynamics and quantum mechanics. Since it does not reflect or transmit any energy, all incoming radiation is absorbed, allowing an ideal black body to be modeled as an object that perfectly absorbs energy.

In terms of thermal radiation and emissions, an ideal black body also emits radiation across a continuous spectrum of wavelengths, depending on its temperature, according to Planck's law. This emission encompasses all potential wavelengths rather than being restricted to specific ones, distinguishing it from objects that emit at specific wavelengths.

By contrast, the other statements are not applicable to an ideal black body. For instance, it does not reflect energy (the option about reflecting energy would apply to non-ideal surfaces), nor does it emit at specific wavelengths in the sense of aligning strictly to select values outside the realm of thermal emission. Finally, while the temperature of a black body does influence the total energy emitted (as per Stefan-Boltzmann Law), this does not alter the fact that it universally absorbs all incident radiation.

Thus,