8K Light Flashcards
How does light travel
In a straight line
What is light
A way of transferring energy from one place to another
Can light travel through a vacuum
Yes
Light travels through
Transverse waves
Light can pass straight through a transparent material . We say light is what through these materials
Transmitted
When a light hits an opaque object what happens
Some of it reflects and some of it is absorbed .
Sometimes you can only see the glow of an object through it . What is this called
A translucent object
What are opaque objects
Objects that do not let light travel through
How do we see non luminous objects
They reflect light
Which objects absorb more light darker or paler
Darker
Why do most objects no reflect anything
Because rough surface reflect light unevenly
What objects reflect light evenly and why
Mirrors produce an image because the have a smooth surface
What is the incident ray
The ray of light that goes toward a mirror
What is The reflected ray of light called
Reflected ray
What is the normal
A dotted line perpendicular to the mirror and helps is measure the angles
What’s refraction
When light travels from one medium to another it bends .this is called refraction
Where does refraction take place
Where two substances meet their interface
When light travels from air to am material which way does it bend and why
It changes direction toward the Normal because it goes from a rare medium to a dense medium
When light travels out into the air i5 travels from
A dense medium to a rare medium
When light travels from a dense medium to a rare medium what happens
It changes direction away from the normal
What is white light
All the colours red orange yellow green blue indigo violet
Coloured light can be made by
Using a filter over white light
How does red filter work
Because it absorbs all the other colours and only transmits the red colour
What are the primary colour of light
Green blue red
What is a convex lens
Convex lens is a converging lens which converges the parallel rays of light passing through it to meet at a point called the focus
What is a concave lens
Diverging lens so the parallel rays of light diverge when they pas through
Explain what happens when a white light goes through a prism
Dispersion which happens due to the refraction of colours at different angle
