When an image is created using a concave lens, What type of image is created?
No image is created
When an image is created using a convex lens, what type of image is created?
A virtual image
A real image
The image can be real or virtual
Light waves travel in straight lines
The refractive number index of a medium is unitless
When light rays go through a convex lens, what happens to them?
Nothing happens them
The diverge away from the normal
They converge towards the normal
What is the power of a convex lens?
It has no power
If a ray hits a medium at the medium's critical angle, the ray passes through the medium without being deflected
What units do we measure the power of lenses in?
If a ray of light travels from one medium into a denser medium (one with a higher refractive index), at what speed does the ray travel in the new medium?
At a faster speed
At a slower speed
At the same speed
What is the power of a concave lens?