Waves and the Nature of Light Random Retrieval

Waves & the Nature of Light Random Retrieval

This quiz contains all the questions in the Waves & the Nature of Light section. The website will pick 10 questions at random.

1 / 10

What is meant by the threshold frequency for a metal?

The frequency of light required to cause electrons to eject from any metal at the speed of light.

The frequency of light required to cause electrons to eject from any metal.

The frequency of light required to cause electrons to eject from a specific metal at the speed of light.

The frequency of light required to cause electrons to eject from a specific metal.

2 / 10

Which sentence is true of ultrasound transducers?

The pulses must be long and the gaps between pulses must be short.

The pulses must be short and the gaps between pulses must be long.

The pulses and the gaps between pulses must be the same duration.

3 / 10

Complete the sentence: "When waves pass from one medium to another, if the mediums have similar densities then most of the energy is ____________."

reflected

absorbed

scattered

transmitted

4 / 10

Remember Young's slits from GCSE? He's back! Incident monochromatic light of 0.43 μm is shone on a double slit of separation of 0.26 mm. If the screen is 42 cm away from the grating, calculate the fringe width.

8.92x10^-11 m

6.95x10^-4 m

3.40x10^-2 m

No diffraction pattern is produced

5 / 10

Select the correct statement.

A virtual image is formed by the convergence of light towards a point.

A real image is formed by the divergence of light away from a point.

A real image is formed by the convergence of light away from a point.

A virtual image is formed by the divergence of light away from a point.

6 / 10

Two points on a wave have a phase difference of 1080°, are they in phase?

Yes

No - they are out of phase

No - they are exactly out of phase

7 / 10

Select the correct pair of conditions necessary for sources of waves to be coherent.

Same wavelength with a phase relationship a time period apart.

Same frequency with a phase relationship a time period apart.

Same wavelength with a constant phase relationship T/2 apart.

Same frequency with a constant phase relationship

8 / 10

Calculate the intensity of a wave of power 1.6 KW and falling on an area of 2.1×10⁴ m²?

0.131 Wm^-2

0.762 Wm^-2

0.076 Wm^-2

1.31 Wm^-2

9 / 10

Calculate the frequency of a wave travelling at 500 ms^-1 with a wavelength of 25 m.

0.05 Hz

20 Hz

1.25 kHz

12.5 kHz

10 / 10

Which wave is being described here: The motion of energy is perpendicular to the direction of travel.

Transverse Wave

Longitudinal Wave

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