Electromagnetic Waves
Physics ⇒ Electricity and Magnetism
Electromagnetic Waves starts at 11 and continues till grade 12.
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See sample questions for grade 11
Describe one practical application of ultraviolet radiation.
Describe the effect of increasing the frequency of an electromagnetic wave on its energy.
Explain the significance of the Poynting vector in electromagnetic waves.
Explain why electromagnetic waves are considered transverse waves.
Explain why electromagnetic waves can travel through outer space.
Explain why electromagnetic waves do not require a medium for propagation.
Name the scientist who experimentally confirmed the existence of electromagnetic waves.
State the relationship between the electric field (E) and magnetic field (B) in an electromagnetic wave propagating in free space.
Which electromagnetic wave is commonly used in remote controls for televisions? (1) Infrared (2) Ultraviolet (3) X-rays (4) Gamma rays
Which electromagnetic wave is used for sterilizing medical equipment? (1) Infrared (2) Ultraviolet (3) Radio waves (4) Microwaves
Which electromagnetic wave is used in night vision devices? (1) Infrared (2) Ultraviolet (3) X-rays (4) Gamma rays
Which electromagnetic wave is used in radar technology? (1) Gamma rays (2) Microwaves (3) Infrared (4) Ultraviolet
Electromagnetic waves are ______ waves because they do not require a medium to propagate.
The direction of propagation of an electromagnetic wave is given by the ______ product of the electric and magnetic fields.
The energy carried by an electromagnetic wave is stored in its ______ and ______ fields.
The energy flux (power per unit area) of an electromagnetic wave is given by the ______ vector.
State whether the following statement is true or false: Electromagnetic waves can be polarized.
State whether the following statement is true or false: The amplitude of the electric field in an electromagnetic wave determines its frequency.
State whether the following statement is true or false: The electric and magnetic fields in an electromagnetic wave are in phase with each other.
State whether the following statement is true or false: The speed of electromagnetic waves in glass is less than in vacuum.
