<Li> Every frequency in the United States National Radio Quiet Zone </Li> <Li> Channel 37: 608 to 614 MHz </Li> <Li> The "Hydrogen line", also known as the "21 centimeter line": 1420.40575177 MHz, used by many radio telescopes including The Big Ear in its discovery of the Wow! signal </Li> <Li> 1406 MHz and 430 MHz </Li>

Describe two advantages that radio telescopes have over light telescopes