Sometimes, you observe one object, and instead of getting one thermal spectrum, you get two! Below is a spectrum taken of a nearby star. Looking at the spectrum, you should see two clear thermal peaks. The one on the left, peaking in the visible range, is from the star. What's causing the other peak?

It turns out that this peak is being produced by a debris disk surrounding this very young star. Debris disks are commonly seen around young stars - they are usually present during planet formation and then eventually dissipate. What temperature is the material in this disk at? Show your work and explain your reasoning clearly.

Hint: Pay attention to the wavelength units!!

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explanation:

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

third one with arrows on top of each other going the same direction