All about light
A form of energy that allows us to see things around us.
Light
Which type of material lets almost all light pass through it?
Transparent.
A dark area that forms when an object blocks light is called this.
A shadow
What is reflection?
Reflection is when light bounces off a surface.
This is what we call the bending of light as it travels from one material to another.
Refraction
What is Earths main source of light?
The sun
Which type of material blocks light completely?
Opaque
What is a shadow?
A shadow is a dark area formed when an object blocks light.
Which surface reflects light best: a mirror, cardboard, or fabric?
A mirror reflects light best because it has a smooth, shiny surface.
What happens to light when it travels from air into water?
The light slows down and changes direction (bends), causing refraction.
How does light travel?
In straight lines
Which types of material allows some light to only pass SOME through?
Translucent
What three things are needed to make a shadow?
A light source, an opaque object, and a surface for the shadow to fall on.
Light travels in straight lines until...
It hits an object or surface
A What?
uses light to create an image that appears three-dimensional.
A hologram
Name 2 natural sources of light
Teacher to choose if the answer is corect.
May include firflies, angler fish, stars, sun, lava, lightening, aurora
Light transmission heppens when...
light passes through a material/ something
Why do black objects often feel warmer than white objects in sunlight?
Black objects absorb more light energy, which is converted into heat.
Mirrors have a ?????, which enables them to reflect anything that is put in front of them.
reflective surface
Name two ways that humans use refraction.
Answers may vary. Teachers to decide.
May include:
telescopes, camera lenses and even eye glasses, microscopes, magnifying glasses.
Why can we see objects even though they do not make their own light?
We see objects because light reflects off them and enters our eyes.
Name 2 transparent, 2 translucent and 2 Opaque materials.
Answers may vary. May include...
Transparent- glass, plastic, water, air
Translucent- frosted glass, baking paper, sheer fabric, cellophane
Opaque- brick, dark paper, cardboard, wood.
A student moves a torch closer to an opaque object. How will the shadow change, and why?
The shadow becomes larger because the object blocks a wider spread of the light as the light source gets closer.
When light hits an uneven surface it does this?
scatters in differnet ddirections.
All natural occuring refraction involves this.
Water