Your hospital - seeing inside

Question 1

What is endescopes?

Answer 1

It is a light pipe that can help you see inside someone.

Question 2

If light hits the boundary between glass and air at a shallow angle it _______.

Answer 2

Refracts

Question 3

How big does the angle have to be reflect between glass and air?

Answer 3

A very large angle

Question 4

There is a special angle where the angle of refraction is 90 degrees.What is this angle called?

Answer 4

A critical angle

Question 5

What is total internal reflection? How does it happen?

Answer 5

It is where the light reflects back and stays inside the glass.It happens inside glass fibres called optical fibres.

Question 6

How does the endescope work?

Answer 6

There is a light and camera in the end the camera that is in the stomach sends pictures up optical fibres inside the endescope.

Question 7

X-rays have a much higher ______,and higher______,than light.

Answer 7

• frequency

* energy

Question 8

What absorbs x-rays better than soft tissues?

Answer 8

Bones

Question 9

The amount of ______ that pass straight through or are absorbed builds up a picture of what’s inside the body.

Answer 9

x-rays

Question 10

To use gamma rays a patient drinks a medical tracer taken in by their kidneys.How does the gamma rays form an image?

Answer 10

A detector

Question 11

To see internal organs you use ______ because x-rays and a normal endescope doesn’t produce an image of the internal organs very easily.

Answer 11

Ultra sound

Question 12

What does MRI stand for? and what is it?

Answer 12

It stands for Magnetic resonance imaging.

It allows doctors to see how organs including the brain work.