electromagnetic spectrum

• 1. Electromagnetic waves are transverse waves made up of electrical and magnetic field components.
• Electromagnetic waves are transverse waves made up of electrical and magnetic field components.
• Electromagnetic waves are classified based on wavelengths and frequencies.
• In nature, EM waves have continuous values of wavelength and there is no clear distinction to determine where one type ends and the other one starts.
• Radio waves have the longest wavelength and lowest frequency.
• Radio waves have a wavelength above 1 m and frequencies below 3.0 x 10° Hz.
• Microwaves have wavelengths approximately between 1 m and 1 mm.
• The frequencies of microwaves range from 3.0 x 108 to 3.0 × 10"1 H2.
• Infrared waves have lengths roughly between 1mm and 700 m (nanometer, 10° m).
• Infrared waves are called "infrared" because their frequency is just below that of red light (infra means below).
• Visible light is the region of the EM spectrum that our eyes can see, The wavelength ranges from 700 m to 400 m.
• Red has the longest wavelength and lowest frequency, while violet has the shortest wavelength and the highest frequency.
• Arranging the colors in the order of decreasing wavelengths: red, orange, yellow, green, blue, indigo and violet.
• Under certain conditions, humans may be capable of seeing infrared up to 1050 nm and ultraviolet up to 310 nm.
• Some animals are sensitive to both higher and lower wavelengths.
• Ultraviolet rays are those with wavelengths from 400 nm to 10 mm.
• Ultraviolet rays are called "ultraviolet" because their frequencies are higher than violet light (ultra means going beyond).
• X-rays are those with a wavelength from 10 m to 100 pm (pm means picometers).
• Gamma rays are those with a wavelength of less than 100 pm.
• Both X-rays and gamma rays have the highest amount of energy.
• X-rays and gamma rays can pass through several opaque materials such as human body tissues.