Rankers Physics

Refraction by Prism: Practice Problem & Solution

Pick the wrong answer in the context with rainbow. (2019)
When the light rays undergo two internal reflections in a water drop, a secondary rainbow is formed
The order of colours is reversed in the secondary rainbow
An observer can see a rainbow when his front is towards the sun
Rainbow is a combined effect of dispersion refraction and reflection of sunlight

Solution Explained:

To solve this problem, we apply the core principles of Refraction by Prism. Understanding the underlying formula is key to arriving at the correct answer below:

An observer can only see a rainbow when looking away from the sun, so the sun must be behind them. Thus, the statement that the observer's front is towards the sun is incorrect.

Leave a Reply

Your email address will not be published. Required fields are marked *