X-rays were discovered by Wilhelm Röntgen in 1895 - Leaving Cert Physics - Question 10 - 2007
Question 10
X-rays were discovered by Wilhelm Röntgen in 1895.
What are X-rays? Give one use for X-rays.
The diagram shows a simple X-ray tube.
Name the parts labelled A, B an... show full transcript
Worked Solution & Example Answer:X-rays were discovered by Wilhelm Röntgen in 1895 - Leaving Cert Physics - Question 10 - 2007
Step 1
What are X-rays? Give one use for X-rays.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
X-rays are a form of electromagnetic radiation characterized by high energy and short wavelength. They are used in medicine primarily for imaging purposes, such as taking radiographs of bones to diagnose fractures or other conditions.
Step 2
Name the parts labelled A, B and C.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A = Cathode (filament)
B = Anode (target)
C = Lead (shield)
Step 3
Explain how the electrons are emitted from A.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Electrons are emitted from A due to thermionic emission, where the cathode is heated, causing electrons to gain sufficient energy to overcome the electrostatic forces holding them within the metal.
Step 4
What is the purpose of the high voltage supply?
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The high voltage supply is used to accelerate and attract the electrons towards the anode, providing them with the necessary energy to produce X-rays upon striking B.
Step 5
What happens when the electrons hit part B?
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
When the electrons hit part B (the anode), X-rays are generated through a process that involves their energy being released as they decelerate rapidly.
Step 6
Name a suitable material to use for part B.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A suitable material for part B is tungsten, as it has a high melting point and is efficient at converting kinetic energy into X-rays.
Step 7
Give one safety precaution when using X-rays.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
One safety precaution is to use a lead shield or apron to protect exposed areas of the body from unnecessary radiation exposure when using X-rays.
Join the Leaving Cert students using SimpleStudy...
