Ray Optics and Optical Instruments
Madhya Pradesh Board · Class 12 · Physics
Flashcards for Ray Optics and Optical Instruments — Madhya Pradesh Board Class 12 Physics. Quick Q&A cards covering key concepts, definitions, and formulas.
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See them allState the accepted value of the speed of light in vacuum and its approximate value.
Answer
The accepted value of speed of light in vacuum is c = 2.99792458×10^8 m/s. For many purposes, c ≈ 3×10^8 m/s. It is the highest speed attainable in nature.
निर्वात में प्रकाश की गति का स्वीकृत मान और उसका लगभग मान बताइए।
Answer
निर्वात में प्रकाश की गति का स्वीकृत मान c = 2.99792458×10^8 m/s है। कई उद्देश्यों के लिए, c ≈ 3×10^8 m/s लिया जाता है। यह प्रकृति में प्राप्त की जा सकने वाली सबसे अधिक गति है।…
ज्यामितीय प्रकाशिकी में प्रकाश को किरण के रूप में क्यों माना जाता है?
Answer
प्रकाश की तरंगदैर्ध्य साधारण वस्तुओं की तुलना में बहुत छोटी होती है, इसलिए प्रकाश को किरणें कहलाने वाली सीधी रेखाओं के साथ चलता हुआ माना जा सकता है। किरणों का समूह प्रकाश का पुंज बनाता है।…
Why is light treated as a ray in geometrical optics?
Answer
The wavelength of light is very small compared to ordinary objects, so light can be treated as travelling along straight lines called rays. A bundle of rays forms a beam of light.
State the law of reflection for spherical mirrors.
Answer
The angle of reflection equals the angle of incidence. The incident ray, reflected ray, and the normal at the point of incidence lie in the same plane.
गोलीय दर्पणों के लिए परावर्तन का नियम बताइए।
Answer
परावर्तन कोण, आपतन कोण के बराबर होता है। आपतित किरण, परावर्तित किरण, और आपतन बिंदु पर अभिलंब एक ही तल में स्थित होते हैं।…
एक अवतल दर्पण की वक्रता त्रिज्या 30 cm है। उसकी फोकस दूरी ज्ञात कीजिए।
Answer
दिया है: R = 30 cm सूत्र: f = R/2 चरण 1: f = 30/2 cm चरण 2: f = 15 cm अवतल दर्पण के लिए, संकेत परिपाटी के अनुसार फोकस दूरी ऋणात्मक होती है। उत्तर: f = -15 cm…
A concave mirror has radius of curvature 30 cm. Find its focal length.
Answer
Given: R = 30 cm Formula: f = R/2 Step 1: f = 30/2 cm Step 2: f = 15 cm For a concave mirror, focal length is negative by sign convention. Answer: f = -15 cm…
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