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.
Method 3 â Force Eject. Next, you can try to to force eject the CD/DVD tray to open. Not all drives and burners have this feature. To check to see if yours does, look near the face of the CD/DVD drive and you should see a small hole.Use a toothpick, bent paperclip, or needle to push the button.hat to do if you get a CD or DVD stuck in your computers optical drive, and it wonât eject. You can take several steps to troubleshoot stuck DVDs or CDs. Computers are what they are, complex. Meaning, a stuck DVD could be one of several possible things.