IGCSE Physics - Waves & The Electromagnetic Spectrum

The diagram represents plane wavefronts of a water wave about to strike a solid barrier. Which diagram shows the position of the wavefronts after reflection at the barrier?

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Which diagram shows how the light from a candle is reflected by a mirror, and shows the position of the image formed?

• A
• B
• C
• D

The Moon is 380 000 km from the Earth. A laser light beam is directed from the Earth to the Moon. The beam is reflected back to the Earth. How long does it take for the light to travel to the Moon and back to the Earth?

• 1.27 ms
• 2.53 ms
• 1.27 s
• 2.53 s
• 100 s

The diagram shows an image being formed by a converging lens. Which description of the image formed is correct?

• enlarged and inverted
• enlarged and upright
• diminished and inverted
• diminished and upright

What causes the change in direction when light travels from air into glass?

• The amplitude of the light changes.
• The colour of the light changes.
• The frequency of the light changes.
• The speed of the light changes.

The horn on a ship makes a sound. The captain on the ship hears an echo from a cliff 4.0 s later. The speed of sound is 340 m/s. How far away is the cliff from the ship?

• 170 m
• 340 m
• 680 m
• 1360 m
• 56 m

A fire alarm is not loud enough and the pitch is too low. An engineer adjusts the alarm so that it produces a louder note of a higher pitch. What effect does this have on the amplitude and on the frequency of the sound?

• A larger F greater
• A larger F smaller
• A smaller F greater
• A smaller F smaller

Waves on the surface of water travel from deep to shallow water.Which diagram shows the correct path of the waves in the shallow water?

• A
• B
• C
• D

Which diagram shows what happens when a ray of white light passes through a prism?

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A word is missing from the label below the spectrum. Which word is missing?

• Amplitude
• Frequency
• Speed
• Wavelength