Question

Which of the following statements best describes an electromagnetic wave with a long wavelength?

Question 5 options:

It has a low frequency and can travel through a vacuum.


It has a high frequency and can travel through a vacuum.


It has a low frequency and can only travel through a medium.


It has a high frequency and can only travel through a medium.
Which of the following statements best describes a difference between mechanical waves and electromagnetic waves?

Question 6 options:

Mechanical waves can produce colored light, while electromagnetic waves cannot.


Mechanical waves can travel in any direction, while electromagnetic waves travel only in one direction.


Mechanical waves travel only through a medium, while electromagnetic waves can also travel through a vacuum.


Mechanical waves travel only at the speed of light, while electromagnetic waves can travel at many different speeds.

Answer 1

long wavelenth like red light which has minimum frequency can be seen from distant ...so it has low frequency and travel through vacuum
 option A)

Mechanical waves travel only through a medium, while electromagnetic waves can also travel through a vacuum. This is true...

hope it helped

Answer 2

The best description of an electromagnetic wave with a long wavelength ;

• ( A ) It has a low frequency and can travel through a vacuum

The difference between mechanical waves and electromagnetic waves is ;

• ( C ) Mechanical waves travel only through a medium, while electromagnetic waves can also travel through a vacuum.

The wavelength of an electromagnetic wave is inversely proportional to the frequency of the wave ( i.e. The longer the wavelength the lower the frequency ).  while

Mechanical waves are waves requiring a medium for the transmission of its energy while electromagnetic waves can transmit their energy through  a medium and a vacuum.

Hence we can conclude that The best description of an electromagnetic wave with a long wavelength is, It has a low frequency and can travel through a vacuum and The difference between mechanical waves and electromagnetic waves is Mechanical waves travel only through a medium, while electromagnetic waves can also travel through a vacuum.

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