Behaviour of Light On Different Materials and Surfaces

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Presentation transcript:

Behaviour of Light On Different Materials and Surfaces

Lab time! Take the next 15 minutes to fill out the Behaviour of Light on Different Materials & Surfaces prelab You should do this independently! Once completed, turn to the next page and make predictions HOW WILL LIGHT BEHAVE WHEN A FLASHLIGHT IS SHONE ON THE MATERIALS? AFTER you have made predictions, your teacher will pass out the various materials SHINE A FLASHLIGHT ON THEM, AND RECORD YOUR RESULTS Complete all questions on your sheet!

Have you handed your labs in?! GOOD! NOW LET’S DISCUSS WHAT HAPPENED!

Reflection What happens to light when it is reflected? What colour of tee shirt would you want to wear on a hot day? Why? What happens when you look at a green plant?

Absorption What happens to the light during absorption? What colour absorbs ALL light? What colour absorbs NO light? What happens to white sunlight when it hits a red stop sign?

Transmission What happens to the light during transmission? Is it always 100% transmitted? What are some examples of partial transmission of light?

Refraction What is refraction? WHY does the light bend? DENSITY! The light changes speed Watch the following video discussion the refraction of sunlight! https://www.brainpop.com/science/energy/rainbows/

TRANSPARENT All light goes through Examples Glass Bubbles Clean, clear water Magnifying Glass

TRANSLUCENT Only SOME light goes through Examples Stained glass Tinted windows Sunglasses

OPAQUE NO light goes through Example Apple Wall Table Couch