Reeves Waves and Interactions

Why do you see lightning before you hear it?

• light travels faster than sound
• light has a greater mass than sound
• sound has longer wavelengths than light
• sound and light travel at the same speed

What BEST describes how LIGHT travels through mediums (materials)?

• it goes at the same speed through all mediums
• it goes through air and water but not solids
• it goes fastest through solids, slow through liquids, slowest through gases
• it goes slowest through solids, faster through liquids and fastest through gases

What property of light is shown?

• reflection
• refraction
• absorption
• emission

What happens to the light?

• it hits the mirror at a 45 degree angle and bounces off at a 60 degree angle, reflection

• it bends when it goes through the mirror, refraction

• it hits the mirror at a 45 degree angle and bounces off at a 45 degree angle, reflection

• it stops at the mirror as light is absorbed

Why does the spoon look broken?

• light bounces off it and causes refraction inside the water
• water absorbs the light, causing a reflection
• the water reflects light back out of the glass bending as it travels around the spoon
• light travels through the air and slows down when it hits the water causing refraction

A ceiling light shines onto your white paper.  What happens to the light?

• absorbed
• reflected
• refracted
• transmitted

As the fire truck approached Mary, the pitch of the siren got higher. Once the fire truck passed and moved away, the siren's pitch got lower. This change in pitch is because of a change in the sound wave's

• concussion
• amplitude
• reflection
• frequency

Which statement about sound waves is true? 

• Air travels with them
• They travel through a vacuum
• They exist only if heard
• They can be reflected. 

If the distance represented by the letter A were increased, how would it change the way the sound was heard?

• The sound would be higher
• The sound would be lower
• The sound would be softer
• The sound would be louder

What do we call this piece of glass that separates white light into the colours of the spectrum?

• tuning fork
• prism
• microscope
• graduated cylinder