Rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena are responsible for this?<br/>1. Dispersion<br/>2. Refraction<br/>3. Internal reflection<br/><br/>Select the correct answer using the codes given below:

1. Dispersion — Sunlight splits into its constituent colours inside raindrops because different wavelengths deviate by different amounts. Verdict: Correct.

2. Refraction — Light is refracted when it enters the raindrop and again when it emerges. This bending is essential in rainbow formation. Verdict: Correct.

3. Internal reflection — After entering the drop, light undergoes internal reflection before coming out toward the observer. This is a key step in forming the primary rainbow. Verdict: Correct.

Hence, all three phenomena are involved in rainbow formation.