Podcast
Questions and Answers
What is the main difference between AM and FM radio stations?
What is the main difference between AM and FM radio stations?
- AM stations use frequency modulation while FM stations use amplitude modulation. (correct)
- FM stations have wider range of wavelengths than AM stations.
- AM stations have higher carrier frequencies than FM stations.
- FM stations transmit sound and picture information over long distances.
Who is credited with inventing wireless communication?
Who is credited with inventing wireless communication?
- Nikola Tesla
- Guglielmo Marconi (correct)
- Alexander Graham Bell
- Thomas Edison
How were the first digital wireless signals translated into words?
How were the first digital wireless signals translated into words?
- By translating long and short pulses into Morse code (correct)
- By varying the frequency of the carrier wave
- Using only audio signals
- Through modulating carrier frequencies
What is the purpose of modulating the carrier wave in radio communication?
What is the purpose of modulating the carrier wave in radio communication?
What frequency range do AM radio stations typically operate within?
What frequency range do AM radio stations typically operate within?
How did Marconi establish the first transatlantic 'wireless communication'?
How did Marconi establish the first transatlantic 'wireless communication'?
What is the primary reason why UV-C rays are considered the most harmful?
What is the primary reason why UV-C rays are considered the most harmful?
Why did Johann Wilhelm Ritter place silver chloride beyond the violet spectrum during his experiment on ultraviolet light?
Why did Johann Wilhelm Ritter place silver chloride beyond the violet spectrum during his experiment on ultraviolet light?
What is the closest type of ultraviolet light to visible light?
What is the closest type of ultraviolet light to visible light?
Why did Wilhelm Conrad Roentgen call X-rays 'X'?
Why did Wilhelm Conrad Roentgen call X-rays 'X'?
What distinguishes gamma rays from other waves in terms of energy and wavelength?
What distinguishes gamma rays from other waves in terms of energy and wavelength?
What is the main application of X-ray Screening Systems in airports, courthouses, and prisons?
What is the main application of X-ray Screening Systems in airports, courthouses, and prisons?
What range does the INFRARED (IR) spectrum cover?
What range does the INFRARED (IR) spectrum cover?
How does the wavelength of infrared (IR) light compare to that of visible light?
How does the wavelength of infrared (IR) light compare to that of visible light?
What is the purpose of thermal imaging?
What is the purpose of thermal imaging?
How is visible light refracted by a prism?
How is visible light refracted by a prism?
Why does Earth's atmosphere typically appear blue?
Why does Earth's atmosphere typically appear blue?
What causes objects to change color as they heat up?
What causes objects to change color as they heat up?
