SOUND AND LIGHT

Which of the following shows that sound waves are mechanical waves?

• Sound travels faster in solids than in liquids

• Sound travels faster in liquids than in gases

• Sound doesn't travel in a vacuum

• Sound spreads out and can be heard around corners

In which of the following ways is sound NOT used?

• Dog Whistle which you cannot hear

• X-rays to see broken bones

• Ultrasound to see an unborn baby

• Ultrasound to find fish in the ocean

The loudness of a sound is directly related to its...

• Amplitude

• Frequency

• Pitch

• Speed

In Young's double-slit experiment, which of the following is causes the bright and dark fringes?

• Reflection

• Refraction

• Diffraction

• Interference

Is light a particle or a wave?

• Particle

• Wave

• Both

• Neither

Which of the following explains why the image produced by a pinhole camera is inverted?

• Diffraction of light

• Refraction of light

• Light travels in straight lines

• Light diffracts easily

The moon is tilted at 5 degrees to the solar plane explains

• why we have tides

• why solar eclipses don't occur every month

• why lunar eclipses happen every year

• why the moon is made of chees

Which of the following is the partial shadow produced in an eclipse?

• Umbra

• Penumbra

• Sub Umbra Floreo

• Umbrella-Ella-Ella