Light
Name an object that is transparent.
Curtains, tissue paper, glass...
What causes sound?
Sound is caused by vibrations.
Draw a loud sound wave, then draw a quiet sound wave.
Loud- larger/taller waves. Quiet- shorter/smaller waves
Name an object that is opague.
A desk, a computer, a chair, a table...
What is wavelength?
The distance between two peaks of a wave.
What is the visible spectrum?
Light waves we can see.
Name an object that is translucent.
Frosted glass, sunglasses, bubble wrap...
What is the highest point of a wave called?
Peak.
What is energy? Give an example of a natural source of light energy.
The ability to do work. The sun, stars, lightning.
What is reflection?
A mirror image.
What is the lowest point of a wave called?
Trough.
Give 3 examples of artificial light sources.
Lightbulbs, lasers, candles..
What is refraction? Give an example.
Bending of light. When a straw is placed in water, the object appears bent.
How do you know when there is a high frequency?
There will be many sound waves in a row.
Using a mirror, demonstrate light reflection in the classroom. Explain why this happens.
Must reflect light from the sun off the mirror.