Electromagnetic Spectrum Flashcards
What protective measures can we take against the risks of electromagnetic waves?
Microwaves - Mesh grate to protect people.
Sunglasses - protect your eyes from visible light.
Sunscreen - protect your skin from UV rays
What is the electromagnetic spectrum arranged in order of?
Wavelengths from radio waves to gamma rays
The order includes Radio, Microwaves, Infrared, Visible, Ultraviolet, X-rays, and Gamma rays.
What are the colours of the visible spectrum arranged by decreasing wavelength?
Red, Orange, Yellow, Green, Blue, Violet
Red has the longest wavelength and Violet has the shortest.
What is the longest wavelength and lowest frequency colour in the visible spectrum?
Red
Red is at one end of the visible light spectrum.
What is the shortest wavelength and highest frequency colour in the visible spectrum?
Violet
Violet is at the opposite end of the visible light spectrum.
What is a primary use of radio waves?
Communication (TV, radio, mobile phones)
Radio waves are essential for wireless communication.
What is a primary use of microwaves?
Cooking (microwave ovens), Satellite communication
Microwaves are commonly used in kitchen appliances and for communication.
What is a primary use of infrared (IR) waves?
Remote controls, Night vision, Heaters
Infrared is used in various technologies for heat and communication.
What is a primary use of visible light?
Seeing, Photography, Fiber optic communication
Visible light is essential for human vision and many technologies.
What are the primary uses of ultraviolet (UV) light?
Sterilisation, Detecting fake banknotes, Sun tanning
UV light has applications in health and security.
What is a primary use of X-rays?
Medical imaging (broken bones, security scans)
X-rays are widely used in healthcare and security.
What is a primary use of gamma rays?
Cancer treatment, Sterilising medical equipment
Gamma rays are used in advanced medical treatments.
Are radio waves generally safe?
Yes
Radio waves are considered safe for human exposure.
Can microwaves cause harm to the body?
Yes, they can heat body tissues, causing burns
Precautions are necessary when using microwaves.
Can infrared (IR) waves cause burns?
Yes
Infrared can cause skin burns if exposure is excessive.
Can visible light damage eyes?
Yes, if too intense (e.g., lasers)
Intense visible light can lead to eye injuries.
What are some risks of ultraviolet (UV) exposure?
Skin cancer, sunburn, eye damage
UV exposure is linked to various health issues.
What risks are associated with X-rays?
Cell damage, cancer risk (too much exposure)
Caution is advised to limit X-ray exposure.
What can gamma rays cause?
Severe cell damage and cancer
Gamma rays are highly penetrating and dangerous.
