Sound and Light

Which is NOT TRUE about Sounds?

• Sound needs a medium to propagate.

• A sound is a form of energy.

• Sound can travel in a vacuum.

• Sound speed is affected by temperature.

Which of the following shows the correct order of speed of sound?

• liquid > gas > solid

• solid > gas > liquid

• solid < liquid < gas

• gas < liquid < solid

How does the temperature of an area affect the velocity of the sound?

• The higher the temperature, the slower the sound travels.

• The lower the temperature, the slower the sound travels.

• At 0 degrees Celcius, the sound reaches its maximum speed

• The temperature has no relation to sound.

What is the relationship between sound and temperature?

• Direct proportional

• Equal

• Indirect proportional

• Absolute

For sound to propagate, which of the following factor/s is/are required?

• medium

• receiver

• source

• All are needed.

It refers to the bouncing back of sound upon hitting a barrier.

• Diffraction

• Echo

• Refraction

• Dispersion

Which temperature scale is required to compute the speed of sound?

• Celcius

• Fahrenheit

• Kelvin

• Rankine

How does light travel?

• in parallel lines

• in a straight path

• on its orbit

• in different direction

Which material is NOT translucent?

• frosted glass

• hollow block

• thin sheet of plastic

• tissue paper

Why does a straw look broken when you put it in a cup of water?

• it is broken

• it is being refracted

• it is being reflected

• it is being dispersed.