A blackbody, which is an âidealâ or âperfectâ emitter (that means its emission properties do not vary based on location or the composition of the object), emits a spectrum of light with the following properties: The hotter the blackbody, the more light it gives off at all wavelengths. That is, if you were to compare two blackbodies, regardless of what wavelength of light you observe, the hotter blackbody will give off more light than the cooler one.
Right-click on the disc and select Eject, or select the disc and then click on the blue Eject button on the top toolbar of the application window. 3. Restart your Mac while holding down the mouse or trackpad button. Make sure you hold it down until your computer has fully restarted.
Right-click the disc drive icon and select Eject from the list of options. Remove the disc from the disc drive carefully, holding it only by the outer edges. Quit and exit any active programs running from the disc. Click the disc icon on your desktop and drag it to the Trash Bin icon. If this fails, you can still attempt to eject the disc using the Disk Utility.