Reflection
What is a wave?
A disturbance that transfers energy from one place to another.
What happens when light hits a mirror?
It reflects back; the angle of incidence = angle of reflection.
Why does a black shirt feel hotter than a white shirt in the sun?
Black absorbs more light and turns it into heat; white reflects most light.
What does it mean if a wave is transmitted?
It passes through a material
Which type of classroom material lets most light pass through, like clear glass?
Transparent
What is the distance between two crests of a wave called?
Wavelength
What do we call the angle at which a wave strikes a surface?
Angle of incidence
What happens to wave energy when it is absorbed?
It often turns into heat.
Give an example of a transparent material.
Clear glass or water
Why does a classroom window let us see outside?
It transmits light (transparent) .
What is the height of a wave from its rest position called?
Amplitude
What real-world example shows sound waves reflecting?
An echo
What is an example of absorption in sound waves?
Soundproof foam absorbing sound energy.
Give an example of a translucent material.
Frosted glass
Why do tinted windows look darker?
They transmit some light but absorb the rest
What unit is used to measure frequency?
Hertz
If light hits a mirror at 40°, at what angle will it reflect?
40
What type of energy is light usually changed into when absorbed?
Heat energy
Give an example of an opaque material.
Wood or metal
Why does a desk block light completely?
It is opaque .
What unit is used to measure wavelengths of light?
Nanometer
Why is reflection important in telescopes and mirrors?
It redirects light to focus or form images.
Can a material both absorb and transmit?
YES
Why can we hear sound through air but not through a brick wall?
Because air transmits sound waves easily, while brick is opaque to sound and blocks most of the energy
Why does the amount of light that passes through a material depend on the type of material?
Because different materials absorb, scatter, or transmit light in different amounts