RRB Technician Grade 3 previous year question
If the speed of light in a medium is 2.25 × 10⁸ m/s, its refractive index is ________.
Asked in RRB Technician Grade 3 (10 Mar 2026 Shift 1) · Science
Tap an option to check your answer.
Show answer and explanation
Correct answer: (B) 1.33
Refractive index n = speed of light in vacuum / speed of light in medium = (3×10⁸)/(2.25×10⁸) ≈ 1.33.
हिंदी में प्रश्न
यदि किसी माध्यम में प्रकाश की चाल 2.25 × 10⁸ m/s है, तो उसका अपवर्तनांक ________ होगा।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (B) 1.75
अपवर्तनांक n = निर्वात में प्रकाश की गति / माध्यम में प्रकाश की गति = (3×10⁸)/(2.25×10⁸) ≈ 1.33 होता है।
More solved Science questions
- Which of the following statements is/are true regarding the speed of sound? (i) The speed of sound decreases with an increase in the…
- Two resistors of 5 Ω and 15 Ω are connected in series to a battery of 10 V. How much current will flow through the circuit?
- An object has a mass of 12 kg and moves with a constant speed of 8 m/s. How much kinetic energy does it have?
- A constant force of 21 N moves a body through 3 m in its own direction. Work done is ________.
- How much work is required to move a charge of 3 C between two points that have a potential difference of 15 V?
- Which condition is required for methane to undergo a substitution reaction with chlorine?