203

You visited us 203 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard X

Physics

Refraction

Consider Gali...

Question

Consider Galileo's method of measuring the speed of light using two lanterns. To get an accuracy of about 10%, the time taken by the experimenter in closing or opening the shutter should be about one tenth of the time taken by the light in going from one experimenter to the other. Assume that it takes 1/100 second for an experimenter to close or open the shutter. How far should the two experimenters be to get a 10% accuracy? What are the difficulties in having this separation?

Open in App

Solution

We have speed of light = 299792458 m/s

To have a accuracy of 10% the light has to travel 1/10^th of a second between the observers so,

Distance travelled by the light in 0.1 s = 0.1×299792458= 29979 km.

The difficulty in separation of that distance will be the curvature of earth. As the earth’s surface is curved, light from one of the experimenters won’t reach the other.

Suggest Corrections

Similar questions

Q. In an experiment, on the measurement of

g

, using a simple pendulum, the time period was measured with an accuracy of

0.2

% while the length was measured with an accuracy of

0.5

%. The percentage accuracy in the value of

g

thus obtained is

Q. In an experiment to determine the value of acceleration due to gravity,

g

, using a simple pendulum, the measured value of length of the pendulum is

31.4 c m

known to

1 m m

accuracy and the time period for

100

oscillations of pendulum is

112.0 s

known to

0.01 s

accuracy. The accuracy in determining the value of

g

is :

In Galileo's experiment in order to reach the same height how far must the ball go on the horizontal surface after being released from an incline of a height of 5m?

Q. In a simple pendulum experiment for the determination of acceleration due to gravity, time period is measured with an accuracy of

0.2

% while length was measured with an accuracy of

0.5

%. The percentage accuracy in the value of

g

so obtained is

Q. The length of a simple pendulum is about

100 c m

, known to have an accuracy of

1 m m

. Its period of oscillation is

2 s

, determined by measuring the time for

100

oscillations using a clock of

0.1 s

resolution. What is the accuracy in the determined value of

g

Join BYJU'S Learning Program