27 DOL II

What is the formula to calculate the velocity of a wave?

If the frequency of a wave is doubled, what happens to its wavelength, assuming the velocity remains constant?

• The wavelength doubles.

• The wavelength is halved.

• The wavelength remains the same.

• The wavelength becomes zero.

Which of the following best describes the effect of amplitude on the energy of a wave?

• Energy is directly proportional to the square of the amplitude.

• Energy is inversely proportional to the amplitude.

• Energy is directly proportional to the amplitude.

• Energy is independent of the amplitude.

Which of the following waves has the highest frequency in the electromagnetic spectrum?

• Radio waves

• Microwaves

• X-rays

• Infrared waves

What is the primary application of infrared waves?

• Medical imaging

• Communication

• Night vision

• Cooking

How does constructive interference affect the amplitude of waves?

• It decreases the amplitude.

• It cancels out the waves.

• It increases the amplitude.

• It has no effect on the amplitude.

Calculate the velocity of a wave with a frequency of 500 Hz and a wavelength of 2 meters.

• 1000 m/s

• 250 m/s

• 500 m/s

• 2000 m/s

Which of the following statements is true about electromagnetic waves?

• They require a medium to travel.

• They can travel through a vacuum.

• They are longitudinal waves.

• They have constant amplitude.

Explain how the frequency and wavelength of electromagnetic waves are related in terms of energy.

• Higher frequency and shorter wavelength mean lower energy.

• Higher frequency and shorter wavelength mean higher energy.

• Lower frequency and longer wavelength mean higher energy.

• Frequency and wavelength do not affect energy.

A wave has a velocity of 300 m/s and a frequency of 60 Hz. What is its wavelength?

• 5 m

• 0.2 m

• 18000 m

• 50 m