<u>Answer:</u>
Supreme court is the guardian of the constitution however, through constitutional amendment, the constitution can be altered or changed.
<u>Explanation:</u>
Due to the rigidity of US constitution only,27 amendment could be carried till now. First constitutional amendment was ratified during the year 1791 granting the rights to religion, speech, assembly etc. This was one among the first ten amendment which were called the bill of rights.
This process of amending the constitution is very long and complicated. It requires the special majority. This is done to uphold the rigid nature of the constitution.
They are used as radio waves, infrared radiation, visible light.
