Question

question 5.1.4 which of the following statements about a black body or black - body radiation are true? select all that apply. idealized substance which does not exist not relevant to any real substance red hot is hotter than white hot emitted wavelength intensity distribution depends on temperature

Explanation:

1. A black - body is an idealized substance, but it serves as a useful model for understanding real - world radiation phenomena, so the statement "Idealized substance which does not exist" is true in the strict sense of not being a real - world entity but is still relevant.
2. Black - body radiation is relevant to many real substances as it helps explain their radiation behavior, so "not relevant to any real substance" is false.
3. White hot is hotter than red hot because as the temperature of a radiating body increases, the color shifts from red to white, so "red hot is hotter than white hot" is false.
4. The emitted wavelength intensity distribution of a black - body depends on its temperature, as described by Planck's law. This is a fundamental property of black - body radiation.

Answer:

Idealized substance which does not exist, Emitted wavelength intensity distribution depends on temperature