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Wallpaper (computing) A wallpaper or background (also known as a desktop background, desktop picture or desktop image on computers) is a digital image (photo, drawing etc.) used as a decorative background of a graphical user interface on the screen of a computer, smartphone or other electronic device. On a computer, wallpapers are generally ...
1. Sign in to Desktop Gold. 2. Click the Settings button. 3. Click Personalization. 4. Click the Sounds tab. 5. Click Customize My Sounds. 6. Search for a sound or select a category from the "All" menu at the top-right. 7. Optionally, click the Preview button to play a sound. 8. Click Apply to choose a sound.
Background radiation. Background radiation is a measure of the level of ionizing radiation present in the environment at a particular location which is not due to deliberate introduction of radiation sources. Background radiation originates from a variety of sources, both natural and artificial. These include both cosmic radiation and ...
Cosmic background radiation is electromagnetic radiation that fills all space. The origin of this radiation depends on the region of the spectrum that is observed. One component is the cosmic microwave background. This component is redshifted photons that have freely streamed from an epoch when the Universe became transparent for the first time ...
The random letters, numbers, and characters in the top-right of your screen is the anti-keylogging window that disguises the actual keys you type on your keyboard with randomly-generated characters. This feature helps prevent criminals from stealing your sensitive data while you're signed into Desktop Gold.
Find and select the file or image you'd like to attach. Click Open. The file or image will be attached below the body of the email. If you'd like to insert an image directly into the body of an email, check out the steps in the "Insert images into an email" section of this article.
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The discovery of cosmic microwave background radiation constitutes a major development in modern physical cosmology. In 1964, US physicist Arno Allan Penzias and radio-astronomer Robert Woodrow Wilson discovered the cosmic microwave background (CMB) , estimating its temperature as 3.5 K, as they experimented with the Holmdel Horn Antenna .