Question

have you ever felt heat from a fireplace? or the warm rays of the sun? then youve encountered infrared waves! infrared waves are a type of electromagnetic wave. we cannot see infrared waves, but they are all around us. the unique characteristics of infrared waves have led to their use in tv remote controls, thermal imaging cameras, and devices that monitor earth and space.
this model shows different types of electromagnetic waves.
the electromagnetic spectrum
wavelength (m)
10
1
10¹
10²
10³
10⁴
10⁵
10⁶
10⁷
10⁸
10⁹
10¹⁰
10¹¹
10¹²
radio
microwave
infrared
visible light
ultraviolet
x - ray
gamma
frequency (hz)
10¹
10²
10³
10⁴
10⁵
10⁶
10⁷
10⁸
10⁹
10¹⁰
10¹¹
10¹²
10¹³
10¹⁴
10¹⁵
10¹⁶
10¹⁷
10¹⁸
10¹⁹
10²⁰
complete the sentence.
compared to visible light, infrared waves have wavelengths, have frequencies, and carry energy.

Explanation:

Step1: Analyze the electromagnetic spectrum

From the given electromagnetic - spectrum diagram, we can see the position of infrared and visible light. Infrared waves are on the left - hand side of visible light in terms of wavelength.

Step2: Recall the relationship between wavelength, frequency and energy

The relationship between wavelength ($\lambda$), frequency ($f$) and energy ($E$) is given by $c = \lambda f$ (where $c$ is the speed of light) and $E=h f$ (where $h$ is Planck's constant). As $\lambda$ increases, $f$ decreases (since $c$ is constant), and as $f$ decreases, $E$ decreases.

Step3: Compare infrared and visible light

Infrared waves have longer wavelengths than visible light. Since $c = \lambda f$, longer wavelengths mean lower frequencies. And since $E = hf$, lower frequencies mean lower energy.

Answer:

longer; lower; lower