Question

3
select the correct answer.
which electromagnetic waves are invisible and have the longest wavelengths, ranging from a few inches to longer than a football field?

a. infrared radiation

b. ultraviolet radiation

c. radio waves

d. microwaves

Explanation:

To solve this, we analyze the properties of each electromagnetic wave:

• Option A: Infrared radiation has shorter wavelengths than radio waves, typically in the range of micrometers to millimeters.
• Option B: Ultraviolet radiation has much shorter wavelengths (nanometer range) and is not in the range described.
• Option C: Radio waves are invisible and have the longest wavelengths among electromagnetic waves, ranging from a few centimeters (inches) to hundreds of meters (longer than a football field).
• Option D: Microwaves have shorter wavelengths than radio waves, usually in the centimeter to millimeter range.

Answer:

C. radio waves