Investigating Light Flashcards
Why is it best to do light experiments in dim rooms
Because your using rays of light you can then clearly see paths of the rays of light
Why do light experiments use ray boxes or lasers
So you can trace the paths of the rays more accurately, meaning more exact angle measurements
What type of materials do you use to investigate rafraction
Transparent materials
What can you investigate when looking at how much light is refracted when it passes from air to a different material
How the boundaries between different substances refract light by different amounts
Whats the first thing you do when investing light through refraction
Place a transparent box on a price of paper (draw around it)
Use a laser or ray box to shine a light ray at the middle of the block , trace this incident ray and where the light emerges from the other side
Whats the second thing you do when investing light through refraction
After tracing the incident ray and emerging ray, remove the block and join up the two rays with a straight line
Next draw a normal at where the incident ray entered the block
Then use a protractor to measure the 2 angles (angle of incidence) (angle of refraction)
How can you change the experiment to test different amounts of refraction
Use different rectangular blocks made from different materials but keep the incident angle the same throughout
What do you compare when doing a light reflection investigation
Compare how different surfaces reflect light and confirms the rules for reflection
What’s the first step in the reflection experiment
Draw a straight line across a piece of paper and place an object so one of its sides lines up with it
Then shine a ray of light on the objects surface and trace the incoming and reflected beams
What’s the next steps after drawing the reflected beams in the reflection experiment
Draw the normal at where the ray hits then object and measure the angle of incidence and angle of reflection and the width and brightness of the reflected ray
How can u measure how different surfaces reflect light
Change the object you use in the experiment
What is the reflection rule
The angle of incidence always equals the angle of reflection
