Welcome to the Science Quiz 190

This is a timed quiz. You will be given 15 seconds per question. Are you ready?

Bats can ascertain distances, directions, nature and size of the obstacles at night. This is possible by reflection of the emitted?

Supersonic waves from the distant objects

Ultrasonic waves from the bat

Supersonic waves from the bat

None

Correct! Wrong!

Ultrasonic waves are those sound waves having frequency?

Between 1000 hertz and 20000 hertz

More than 20 kilohertz

Between 20 hertz and 1000 hertz

None

Correct! Wrong!

The audible frequency range of a human ear is:

200 hertz to 2000 hertz

20 hertz to 20000 hertz

20 hertz to 200 hertz

None of these

Correct! Wrong!

‘Newton’s disc’ when rotated at a great speed appears ?

Green

Orange

White

None

Correct! Wrong!

Light travels slower in glass than in air because ?

Density of glass is greater than that of air

Refractive index of air is greater than that of glass

Refractive index of air is less than that of glass

None

Correct! Wrong!

In vacuum, the speed of light?

Depends on frequency

Depends on wavelength

Depends on intensity

Neither depends on its wavelength, frequency nor intensity

Correct! Wrong!

Light travels in optical fibre irrespective of its shape because it is a device by which signals can be transferred from one location to another. It is based on the phenomenon of?

Total internal reflection of light

Refraction

Reflection

None

Correct! Wrong!

Which one among the following is not produced by sound waves in air?

None

Correct! Wrong!

Science Quiz 190

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Welcome to the Science Quiz 190

Bats can ascertain distances, directions, nature and size of the obstacles at night. This is possible by reflection of the emitted?

Ultrasonic waves are those sound waves having frequency?

The audible frequency range of a human ear is:

‘Newton’s disc’ when rotated at a great speed appears ?

Light travels slower in glass than in air because ?

In vacuum, the speed of light?

Light travels in optical fibre irrespective of its shape because it is a device by which signals can be transferred from one location to another. It is based on the phenomenon of?

Which one among the following is not produced by sound waves in air?

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