Question 5 - Assertion Reasoning Questions (MCQ) - Chapter 11 Class 10 - Human Eye and Colourful World

Assertion (A): A white light on passing through  prism splits into its component colours as such  that the red light emerges nearest to the base of  the prism.  

Reason (R): Wavelength of red light is more than  other component colours and hence, red light deviates least.  

Answer

For assertion

• The prism split the incident white light into 7 colors VIBGYOR -  Violet, Indigo, Blue, Green, Yellow, Orange and Red. 
• Here, violet light emerges nearest to the base of the prism

For reasoning 

• Wavelength is inversely proportional to the deviation in the path of the light.
• Red has the highest wavelength and violet the least
• Hence, red light deviates least .

Thus,

• The assertion is false
• The reason is true

So, the correct answer is (d)