Electromagnetic Spectrum

Which two waves lie at the ends of the visible spectrum ?

• Infrared and Ultra-violet rays

• Radio waves and Microwaves

• Radio waves and X-rays

• X-rays and Gamma Rays

In the visible spectrum, which color has the longest wavelength ?

• Blue

• Green

• Red

• Violet

Which property spells the difference between infra-red and ultra-violet radiation ?

• Color

• Speed in Vacuum

• Wavelength

• None of the above

A certain radio station broadcasts at a frequency of 675 kHz. What is the wavelength of the radio waves ?

• 280 meters

• 324 meters

• 400 meters

• 444 meters

What type of electromagnetic waves is used in radar ?

• Infrared waves

• Microwaves

• Radio waves

• Ultra-violet waves