Question 42 marksShort AnswerSection A

$3/2$

Light — Reflection and Refraction

Refraction

Official answer

\frac{8}{3} \times 10^8

Speed of light in water

Refractive index of water with respect to air

Refractive index of glass with respect to air

Speed of light in glass

Marking scheme

1. $1 mark for the correct answer$
2. $1 mark for the correct calculation$

Hint

$["Use the concept of refractive index to solve this problem.", "The refractive index of a medium is equal to the ratio of the speed of light in air to the speed of light in the medium."]$

Quick oral answer

$\frac{8}{3} \times 10^8$

Common mistakes

1. $Incorrect calculation of the speed of light in water$
2. $Incorrect use of the refractive index formula$

Analysis and explanation

["The problem requires us to find the speed of light in water given the refractive indices of glass and water with respect to air, and the speed of light in glass.", "We can use the concept of refractive index to solve this problem.", "The refractive index of a medium is equal to the ratio of the speed of light in air to the speed of light in the medium.", "We can use this concept to calculate the speed of light in water."]

Interesting facts

$The refractive index of a medium is a measure of how much it bends light.$

$The speed of light in a medium is inversely proportional to its refractive index.$

Question details

Q4 of 36 questions

Board: CBSE
Class: Class 10
Subject: Science
Year: 2016
Section: Section A
Marks: 2
Type: Short Answer
Chapter: Light — Reflection and Refraction
Topic: $Refraction$
Bloom's level: Calculative
Syllabus topic: $Refraction of light through a rectangular glass slab$

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Frequently asked questions

$How many marks does this question carry in CBSE Class 10 Science 2016?$

$This question carries 2 marks in the CBSE Class 10 Science 2016 examination.$

$Which chapter does this question come from in Science?$

$This question is from the chapter "Light — Reflection and Refraction" in the CBSE Class 10 Science syllabus.$

$What topic does this question cover in Science?$

$This question covers the topic "Refraction" from CBSE Class 10 Science.$

$What type of question is this in the CBSE Class 10 Science 2016 paper?$

$This is a Short Answer question from Section A in the CBSE Class 10 Science 2016 paper.$