A student is exploring mechanical and electromagnetic waves, compiling a list of questions for her investigation into the properties of each wave type. Which of the following questions would NOT aid her in learning about the properties of both mechanical and electromagnetic waves?

Question

(1 point)
Responses

What is the wavelength of the wave?
What is the wavelength of the wave?

What is the frequency of the wave?
What is the frequency of the wave?

What is the amplitude of the wave?
What is the amplitude of the wave?

What is the wave speed in a vacuum?

The illustration beneath displays the frequencies of different forms of electromagnetic radiation.



Which of the following statements accurately contrasts the frequency and energy levels of infrared waves with ultraviolet waves?

(1 point)
Responses

Infrared waves have frequencies higher than those of ultraviolet waves. As frequency and energy are inversely proportional, this implies that infrared waves also possess less energy than ultraviolet waves.
Infrared waves have frequencies higher than those of ultraviolet waves. As frequency and energy are inversely proportional, this implies that infrared waves also possess less energy than ultraviolet waves.

Infrared waves exhibit higher frequencies than ultraviolet waves. Given the direct proportionality between frequency and energy, it follows that infrared waves also possess more energy than ultraviolet waves.
Infrared waves exhibit higher frequencies than ultraviolet waves. Given the direct proportionality between frequency and energy, it follows that infrared waves also possess more energy than ultraviolet waves.

Infrared waves exhibit frequencies lower than those of ultraviolet waves. As frequency and energy maintain a direct proportionality, it follows that infrared waves also possess lower energy levels compared to ultraviolet waves.
Infrared waves exhibit frequencies lower than those of ultraviolet waves. As frequency and energy maintain a direct proportionality, it follows that infrared waves also possess lower energy levels compared to ultraviolet waves.

Infrared waves have frequencies that are lower than those of ultraviolet waves. As frequency and energy are inversely proportional, it implies that infrared waves also possess higher energy levels than ultraviolet waves.

A student generates a table enumerating various electromagnetic waves along with their energy levels, measured in electron volts.
electromagnet wave energy (eV)
microwave 0.00001
ultraviolet 10
X-rays 30,000
? 5,000,000
With what electromagnetic wave does the student fill in the question mark in the table?

(1 point)
Responses

infrared waves
infrared waves

radio waves
radio waves

gamma rays
gamma rays

visible light waves

Which arrangement correctly indicates the order of the electromagnetic spectrum, ranging from the shortest to the longest wavelength?(1 point)
Responses

microwave → X-ray → gamma ray → ultraviolet → visible → radio → infrared
microwave → X-ray → gamma ray → ultraviolet → visible → radio → infrared

radio → microwave → infrared → visible → ultraviolet → X-ray → gamma ray
radio → microwave → infrared → visible → ultraviolet → X-ray → gamma ray

visible → infrared → ultraviolet → X-ray → gamma ray → radio → microwave
visible → infrared → ultraviolet → X-ray → gamma ray → radio → microwave

gamma ray → X-ray → ultraviolet → visible → infrared → microwave → radio

Certain devices utilize electromagnetic waves to determine the position and velocity of an object. In these devices, the waves are emitted, reflected off the object, and then returned to the device. By understanding the wave's speed and the time it takes for the wave to return, the distance traveled by the wave can be calculated. Which category of wave would be the most secure choice for such a device?

(1 point)
Responses

Opting for radio waves is the safest decision as they pose the least harm to organisms.
Opting for radio waves is the safest decision as they pose the least harm to organisms.

X-rays would be the most secure option as they have the capability to go through various materials.
X-rays would be the most secure option as they have the capability to go through various materials.

Choosing ultraviolet waves is the safest option since they are the most visually detectable.
Choosing ultraviolet waves is the safest option since they are the most visually detectable.

Opting for gamma waves is the safest decision due to their higher speed of travel.

Colleen replicates an X-ray machine by covering an open shoebox with a screen and positioning a square cardboard piece in the center. She uses sand to simulate X-ray radiation, sprinkling it over the screen. Upon removing the screen, she observes an outline of the square cardboard. What does the cardboard symbolize in her simulation?(1 point)
Responses

the veins that look white in an X-ray
the veins that look white in an X-ray

the bones that look white in an X-ray
the bones that look white in an X-ray

the areas that remain black on the X-ray
the areas that remain black on the X-ray

the person being scanned with X-rays

numerous devices utilize the electromagnetic spectrum, such as radios, cell phones, and medical equipment. When devising a device reliant on the electromagnetic spectrum, which category of waves would offer the highest energy to the device?(1 point)
Responses

waves that have shorter wavelengths and lower frequencies
waves that have shorter wavelengths and lower frequencies

waves that have shorter wavelengths and higher frequencies
waves that have shorter wavelengths and higher frequencies

waves that have longer wavelengths and higher frequencies
waves that have longer wavelengths and higher frequencies

waves that have longer wavelengths and lower frequencies
waves that have longer wavelengths and lower frequencies

Answer 1

Let's answer the questions one by one based on the details provided.

1. Which of the following questions would NOT aid her in learning about the properties of both mechanical and electromagnetic waves?

   • The question "What is the wave speed in a vacuum?" would not aid in learning about mechanical waves because mechanical waves require a medium to travel through, whereas electromagnetic waves can travel in a vacuum.

   Answer: What is the wave speed in a vacuum?

2. Which of the following statements accurately contrasts the frequency and energy levels of infrared waves with ultraviolet waves?

   • Infrared waves have lower frequencies than ultraviolet waves. Given that frequency and energy are directly proportional, infrared waves also possess less energy than ultraviolet waves.

   Answer: Infrared waves exhibit frequencies lower than those of ultraviolet waves. As frequency and energy maintain a direct proportionality, it follows that infrared waves also possess lower energy levels compared to ultraviolet waves.

3. With what electromagnetic wave does the student fill in the question mark in the table?

   • Given the highest energy of 5,000,000 eV, this corresponds to gamma rays, which have very high energy levels.

   Answer: gamma rays

4. Which arrangement correctly indicates the order of the electromagnetic spectrum, ranging from the shortest to the longest wavelength?

   • The correct order from shortest wavelength to longest wavelength is: gamma rays, X-rays, ultraviolet, visible, infrared, microwave, radio.

   Answer: gamma ray → X-ray → ultraviolet → visible → infrared → microwave → radio

5. Which category of wave would be the most secure choice for such a device?

   • Radio waves would be the safest choice as they pose the least harm to organisms.

   Answer: Opting for radio waves is the safest decision as they pose the least harm to organisms.

6. What does the cardboard symbolize in her simulation?

   • The cardboard, which blocks some of the simulated 'X-ray' radiation (the sand), represents the bones that appear white in an X-ray because they absorb the radiation more than the surrounding tissue.

   Answer: the bones that look white in an X-ray

7. Which category of waves would offer the highest energy to the device?

   • Waves that have shorter wavelengths and higher frequencies (like X-rays and gamma rays) carry the most energy.

   Answer: waves that have shorter wavelengths and higher frequencies

Let me know if you need any further clarification or assistance!