The absolute magnitude M, of a star or astronomical object is defined as the apparent magnitude it would have as seen from a distance of 10 parsecs (about 32.6 light years). The absolute magnitude of the Sun is 4.83 in the V band (yellow) and 5.48 in the B band (blue).
For example: The word vocabulary is derived from the Latin root wordâvocâ, which means 'word' or 'name'. Other words like advocacy, vocal and vociferous are also derived from the same root word. Hence, if you can recognize some root words, you will get a fair idea of many derived words.
These words were adapted from other language, such as Latin and Greek. It can be helpful to know some of these roots of English vocabulary. It may be possible to guess the meaning of an unknown word when one knows the meaning of its root. Knowing prefixes and suffixes can also help. An English word can consist of three parts: the root, a prefix, and a suffix.