Which of the following waves on the electromagnetic spectrum has the longest wavelength?
gamma rays
infrared waves
microwaves
X-rays
Infrared waves have the longest wavelength among the given options.
Which of the following waves on the electromagnetic spectrum has the highest frequency?
ultraviolet rays
x-rays
infrared waves
radio waves
X-rays have the highest frequency among the given options.
Which statement is true for electromagnetic and mechanical waves?
Electromagnetic waves require a medium to travel, but mechanical waves do not need a medium
Electromagnetic waves travel mainly through matter, and mechanical travel only through a vacuum
Mechanical waves sometimes travel through a vacuum, and electromagnetic waves sometimes travel through matter
Mechanical waves require a medium to travel through, but electromagnetic waves do not need a medium