Question

the higher a waves frequency is, the more energy it carries.
low - frequency radio waves can travel over long distances and can penetrate buildings, making them ideal for radio, television, and mobile phone communication. high - frequency waves like ultraviolet (uv) waves and x - rays carry more energy than radio waves. they are used in medical imaging and to sterilize surfaces and air. these high - energy waves can damage dna and other molecules in living tissue, so they are typically used in controlled settings.
a microwave carries more energy than a radio wave, but it is less suitable for communication because it cannot penetrate metal found in buildings. however, microwaves can be used to heat up food, unlike either radio waves or higher - energy uv waves.
select the true statements.
the applications of an electromagnetic wave depend on its frequency.
radio waves may be used to heat up food.
high - frequency electromagnetic waves can damage human tissue.
microwaves carry more energy than uv waves.
submit

Explanation:

• The text states that different - frequency electromagnetic waves have different applications. For example, low - frequency radio waves are used for communication, high - frequency UV and X - rays are used in medical imaging and sterilization (but also can damage DNA), and microwaves are used for heating food. So, the applications of an electromagnetic wave depend on its frequency.
• It is clearly mentioned that "These high - energy waves can damage DNA and other molecules in living tissue", which means high - frequency electromagnetic waves can damage human tissue.
• The text says "microwaves can be used to heat up food, unlike either radio waves or higher - energy UV waves", so radio waves cannot be used to heat up food.
• Also, it is given that "High - frequency waves like ultraviolet (UV) waves... carry more energy than radio waves" and "A microwave carries more energy than a radio wave", so microwaves carry less energy than UV waves.

Answer:

• The applications of an electromagnetic wave depend on its frequency.
• High - frequency electromagnetic waves can damage human tissue.