किसी प्रिज्म से गुजरने पर सफेद प्रकाश के उसके घटक रंगों में विभाजित होने की घटना को क्या कहा जाता है?

If a coin is placed at the bottom of a tank filled with water, it appears to be located at a higher position than it actually is. Which optical phenomenon explains this observation?

The splitting of light into its component colours when passing through a prism is called _______.