Rainbow formation is a complex phenomenon primarily involving which set of optical processes? MCQ with Answer and Explanation

Rainbow formation is a complex phenomenon primarily involving which set of optical processes?
A. Diffraction, Interference, and Polarization
B. Reflection, Diffraction, and Scattering
C. Refraction, Dispersion, and Total Internal Reflection
D. Reflection, Scattering, and Dispersion
Answer: Option C
Solution (By JKSSB Mock Tests)
A rainbow is formed by sunlight interacting with water droplets. As light enters the droplet, it undergoes refraction and dispersion (separating into colors). The light then strikes the back of the droplet and undergoes total internal reflection. Finally, it undergoes a second refraction as it exits, spreading the spectrum out for the observer to see.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Physics Questions

Question #1
Sound resonance used in:
A. Both
B. Musical instruments
C. Neither
D. Tuning forks

Correct Answer: Option A


Explanation:
Resonance amplifies sound at natural frequency: instruments (guitar body), tuning forks (frequency standard). Memory tip: 'Resonance: musical instruments (amplify), tuning forks (calibration), avoid in bridges'. Wave application frequently tested in competitive exams.

This question belongs to: Science Physics
Question #2
The half-life of a radioactive substance is 10 days. After 30 days, the fraction decayed is
A. 7/8
B. 1/8
C. 1/3
D. 2/3

Correct Answer: Option A


Explanation:
3 half-lives, remaining = 1/8, decayed = 7/8.

This question belongs to: Science Physics
Question #3
Newton's first law defines:
A. Acceleration
B. Force
C. Inertia
D. Momentum

Correct Answer: Option C


Explanation:
Newton's first law (law of inertia) states bodies remain at rest or uniform motion unless acted upon by external force. This defines inertia - resistance to change in motion state. Force is defined in second law; momentum conservation in third. Memory aid: 'First law = inertia; second = F=ma; third = action-reaction'. Fundamental concept frequently tested to assess basic mechanics understanding.

This question belongs to: Science Physics