The last will and testament of Swedish scientist Alfred Nobel established the five Nobel Prizes in 1895 - Leaving Cert Physics - Question 10 - 2019
Question 10
The last will and testament of Swedish scientist Alfred Nobel established the five Nobel Prizes in 1895. The prizes in physics, chemistry, peace, medicine, and liter... show full transcript
Worked Solution & Example Answer:The last will and testament of Swedish scientist Alfred Nobel established the five Nobel Prizes in 1895 - Leaving Cert Physics - Question 10 - 2019
Step 1
State two properties of an electron.
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Answer
An electron has a negative charge, denoted as -1.
It has a small mass, significantly less than that of protons or neutrons.
Step 2
How are the electrons produced in a cathode ray tube?
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Electrons are produced in a cathode ray tube through the process of thermionic emission, where heat causes electrons to be ejected from a heated cathode.
Step 3
How could the beam of electrons be deflected?
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The beam of electrons can be deflected by electric fields or magnetic fields, causing them to change direction.
Step 4
What happens when the beam of electrons strikes the screen?
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When the beam of electrons strikes the screen, it can cause the screen to emit light, leading to a visible display, or convert kinetic energy into light energy.
Step 5
State one use of a cathode ray tube.
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A common use of a cathode ray tube is in older television sets and computer monitors.
Step 6
What are X-rays?
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X-rays are a form of high-energy electromagnetic radiation that can penetrate various materials and are primarily used in medical imaging.
Step 7
Why does a photograph show an X-ray tube?
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The photograph shows an X-ray tube because the electrons inside the tube hit a target, converting their kinetic energy into X-rays.
Step 8
Why might an X-ray tube be surrounded by lead shielding?
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An X-ray tube is often surrounded by lead shielding to protect against ionizing radiation, ensuring safety for both patients and medical personnel.
Step 9
State one use of X-rays.
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One use of X-rays is in medical diagnostics to view inside the body, such as checking for broken bones.
Step 10
State one hazard associated with X-rays.
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One hazard associated with X-rays is the potential risk of cancer due to exposure to ionizing radiation.
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