Electromagnetic Spectrum
What is the order of the electromagnetic spectrum from lowest to highest frequency?
Radio, Microwaves, Infrared, Visible Light, Ultraviolet, X-rays, Gamma rays
Which type of wave is used in medical imaging to see bones?
X-rays
What happens when light bounces off a surface?
Reflection
Which type of EM wave is used for radio and TV signals?
Radio waves
Define wavelength.
The distance between two consecutive crests or troughs of a wave
Which type of wave has the longest wavelength?
Radio waves
Which waves require a medium to travel—mechanical or electromagnetic?
Mechanical waves
What is it called when light bends as it passes from one medium to another?
Refraction
What type of EM wave is used in remote controls?
Infrared waves
Define frequency.
The number of wave cycles that pass a point in one second
What type of wave has the most energy?
Gamma rays
True or False: Electromagnetic waves can travel through space.
True
Which color of visible light has the shortest wavelength?
Violet
Which EM waves are responsible for causing sunburns?
Ultraviolet (UV) waves
Define amplitude.
The height of a wave from its rest position; related to energy
What part of the electromagnetic spectrum can humans see?
Visible light
What type of electromagnetic wave is used for cooking food in microwaves?
Microwaves
Why does a red apple look red?
It reflects red light and absorbs other colors
Which EM waves are used to kill bacteria in food and medical equipment?
Gamma rays
Define medium in terms of waves.
A substance through which a wave can travel
Which has a higher frequency—X-rays or ultraviolet waves?
X-rays
What type of wave is light?
Transverse wave
What causes a rainbow to form in the sky?
Refraction, reflection, and dispersion of sunlight in water droplets
Which EM waves are used in cell phone communication?
Microwaves
Define electromagnetic wave
A wave consisting of vibrating electric and magnetic fields that can travel through space