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Ray Optics and Optical Instruments — Flashcards

Madhya Pradesh Board · Class 12 · Physics

64 flashcards for Ray Optics and Optical Instruments (Madhya Pradesh Board Class 12 Physics) to test yourself on key terms and facts.

96 questions64 flashcards10 formulas & key relations5 concepts

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A diagram illustrating the concept of apparent depth, showing an object placed at the bottom of a liquid and how it appears to be at a shallower depth when viewed from above due to refraction.
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64 Flashcards·
Introduction to lightप्रकाश का परिचयप्रकाश की प्रकृतिNature of lightReflection of lightप्रकाश का परावर्तनगोलीय दर्पणSpherical mirrors
Card 1Introduction to light

State 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.

Card 2प्रकाश का परिचय

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।…

Card 3प्रकाश की प्रकृति

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।…

Card 4Nature of light

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.

Card 5Reflection 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.

Card 6प्रकाश का परावर्तन

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।…

Card 7गोलीय दर्पण

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…

Card 8Spherical mirrors

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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Frequently Asked Questions

What are the important topics in Ray Optics and Optical Instruments for Madhya Pradesh Board Class 12 Physics?
Key topics in Ray Optics and Optical Instruments include Basics of Light, Rays, and Reflection, Refraction, Refractive Index, and Apparent Depth, Total Internal Reflection and Optical Fibre, Refraction at Lenses and Lens Maker’s Formula. Study these first, then practise questions on each for the Madhya Pradesh Board Class 12 board exam.
How many flashcards are available for Ray Optics and Optical Instruments?
There are 64 flashcards for Ray Optics and Optical Instruments covering key definitions, facts and ideas. A few sample cards are shown on this page.
How should I revise Ray Optics and Optical Instruments for the Madhya Pradesh Board Class 12 board exam?
Learn the core ideas first, then work through the 96 practice questions on Ray Optics and Optical Instruments. Revise definitions regularly and use flashcards for quick recall before the exam.

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