It takes light from the Sun approximately 8 minutes to reach the Earth. The speed of light is 3 × 10 8 m s (this is 3 followed by eight zeros). Use this data to calculate the approximate distance of the Earth from the Sun.

Given, Speed of light v = 3 × 10 8 m s Time taken by light from the sun to reach the earth t = 8 minutes = 8 × 60 s = 480 s Let s be the distance of the earth from the sun. Speed is the distance covered by a body in unit time. Speed = distance time Therefore, distance = speed × time s = v × t s = 3 × 10 8 × 480 s = 1440 × 10 8 m s = 1 . 44 × 10 8 km The approximate distance between the earth and the sun is 1 . 44 × 10 8 km

E M B I B E

Science Horizons>Moving Things,People, and Ideas>Chapter 12 - Time and Motion>Think and Answer

Vaishali Gupta, Shalini Bajaj and, Supriya D.Sheshadri Solutions for Exercise 3: Think and Answer

Author:Vaishali Gupta, Shalini Bajaj & Supriya D.Sheshadri

Vaishali Gupta Science Solutions for Exercise - Vaishali Gupta, Shalini Bajaj and, Supriya D.Sheshadri Solutions for Exercise 3: Think and Answer

Attempt the free practice questions from Exercise 3: Think and Answer with hints and solutions to strengthen your understanding. Science Horizons solutions are prepared by Experienced Embibe Experts.

Questions from Vaishali Gupta, Shalini Bajaj and, Supriya D.Sheshadri Solutions for Exercise 3: Think and Answer with Hints & Solutions

MEDIUM

7th CBSE

IMPORTANT

Science Horizons>Chapter 12 - Time and Motion>Think and Answer>Q 1

The distance between the earth and the moon is $384, 400 km$ . It takes four days for a spacecraft to travel from the Earth to the moon. Calculate the speed of the spacecraft. (Hint: Take $1 day = 24 hours$ ). Write the answer is in six significant figures.

MEDIUM

7th CBSE

IMPORTANT

Science Horizons>Chapter 12 - Time and Motion>Think and Answer>Q 2

It takes light from the Sun approximately $8 minutes$ to reach the Earth. The speed of light is $3 \times 10^{8} \frac{m}{s}$ (this is $3$ followed by eight zeros). Use this data to calculate the approximate distance of the Earth from the Sun.

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