Medical physics Flashcards
When is a real image formed
When real light waves meet at a point, the image can be captured
How is a virtual image formed
When light rays appear to come from one place, the image can’t be captured
How can you distinguish between real and virtual images in equations
Real care positive
Virtual are negative
What kind of image is created by a converging lens
Real or virtual
What kind of image is created by diverging lens
Virtual
What’s the equation for magnification.
V/u where v is size of image and u is size of object
What is short sighted and what is the name for it
Myopia they are unable to focus on distant objects
What lens is used to correct short sightedness
Diverging lens
What lens is needed for long sightedness
Converging
What is longsightedness and what’s its name
Hypermetropia and they are unable to focus on close things