17 Questions
What is the main risk associated with certain frequencies of microwaves?
Risk of internal heating due to water absorption
Why are microwaves used in everyday circumstances considered safe for humans?
They emit very small amounts of energy
How do microwave ovens prevent the large amounts of energy they emit from escaping?
By using metal walls and a metal grid in the glass door
Which statement best describes the dangers associated with electromagnetic waves?
Cause direct damage to DNA in cells
What is the main reason for the risk of internal heating from microwaves?
Absorption by water molecules in the body
What happens to the energy of electromagnetic waves as their frequency increases?
Becomes large enough to ionise atoms
Which type of radiation becomes more dangerous as the wavelength gets shorter?
Gamma rays
What effect can gamma rays have on human cells?
Kill them
Which statement is true regarding the risks associated with microwaves?
Microwaves can cause cancer with prolonged exposure
How do ultraviolet, X-rays, and gamma rays affect human body tissue?
Have hazardous effects through ionisation
Which electromagnetic waves have no known harmful effects according to the text?
Radio waves
What is a characteristic of ultraviolet light?
It can cause severe eye damage if exposure is high
How do good quality sunglasses protect the eyes from ultraviolet light?
By absorbing the ultraviolet light
Which type of electromagnetic waves can penetrate the body and cause internal damage?
X-rays and gamma rays
What is a risk associated with exposure to X-rays and gamma rays?
Cell mutation and cancer
How are medical professionals protected from unnecessary exposure to X-rays?
They wear radiation badges to monitor exposure
What are some precautions taken by individuals working with gamma rays?
Routine testing of radiation dose levels
Test your knowledge on the use of x-rays and gamma rays in medicine, their ability to pass through body tissues, and their effects on cells and living tissue. Explore the concepts of x-ray detection and the dangers associated with gamma rays.
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