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 carries a negative charge.
It has a small mass, significantly less than that of protons and 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 thermionic emission, where heating the cathode causes the electrons to escape from its surface.
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.
Step 4
What happens when the beam of electrons strikes the screen?
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When the beam of electrons strikes the screen, energy is transferred, causing the screen to glow, often seen as spots of light. The kinetic energy of the electrons is converted into light energy.
Step 5
State one use of a cathode ray tube.
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A cathode ray tube is commonly used 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, with properties such as having no mass or charge.
Step 7
Why when the electrons strike the target, a large amount of their kinetic energy is converted into heat energy?
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When electrons strike the target, most of their kinetic energy is transferred to the atoms in the target, causing collisions that convert kinetic energy into thermal energy.
Step 8
Why might an X-ray tube be surrounded by lead shielding?
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An X-ray tube is surrounded by lead shielding to protect against radiation exposure, as lead effectively absorbs X-rays, minimizing the risk to health.
Step 9
State one use of X-rays.
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X-rays are used in medical imaging to view the internal structure of the body, such as detecting fractures in bones.
Step 10
State one hazard associated with X-rays.
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One hazard associated with X-rays is the potential for cell damage, which can lead to cancer or other health issues due to exposure.
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