The mean value of yellow light from sodium flame is 5893 A ° . Write it in nm and m .

Given, Wavelength, λ = 5893 A ° We know that, 1 A ° = 10 - 10 m ∴ 5893 A ° = 5893 × 10 - 10 m Also, 1 A ° = 10 - 1 nm ⇒ 5893 A ° = 5893 × 10 - 1 nm 5893 A ° = 589 . 3 nm

E M B I B E

A Text Book of PHYSICS PART I : CLASS 11>Chapter 1 - Measurement and Physics>EXERCISE>Q 9

EASY

11th West Bengal Board

IMPORTANT

Earn 100

What are gross errors ? How they can be minimised ?

Important Questions on Measurement and Physics

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11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 1 - Measurement and Physics>EXERCISE>Q 10

How do errors combine in case of addition and subtraction ?

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11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 1 - Measurement and Physics>EXERCISE>Q 10

How do the errors combine together in case of multiplication and division ?

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IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 1 - Measurement and Physics>EXERCISE>Q 11

Why and how the results of a measurement is rounded off ?

MEDIUM

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IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 1 - Measurement and Physics>EXERCISE>Q 12

What is order of magnitude of a physical quantity ? Explain how the order of magnitude of a physical quantity is decided ?

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IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 1 - Measurement and Physics>EXERCISE>Q 13

Often several quantities are measured and are used to find the value of another quantity. In such situation how we decide which quantities are to be measured with greater accuracy ?

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IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 1 - Measurement and Physics>EXERCISE>Q 14

A quantity

P

depends on three other quantities

x

,

y

and

z

as

P = x^{a} y^{b} z^{c}

, where

a

,

b

,

c

, are numbers. Find the relation between the relative errors of

P

and those

x

,

y

and

z

.

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IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 1 - Measurement and Physics>EXERCISE>Q 15

You are to find the density of a material by measuring its mass and volume. Explain whether you should choose a big body of that material or small one.

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11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 1 - Measurement and Physics>EXERCISE>Q 1

The mean value of yellow light from sodium flame is