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Lec1.pdf Flashcards
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Lec1.pdf Flashcards
Lec1.pdf Flashcards
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Question
What is light?
Answer
Light is rays of vision, color, waves, and energy.
Question
What is the electromagnetic spectrum?
Answer
The continuous range of electric and magnetic spectrum with different wavelengths and frequencies.
Question
What are the different frequencies of electromagnetic waves that produce different kinds of light?
Answer
Radio, Infrared, Microwave, Ultraviolet, Gamma, X-ray.
Question
How does light behave as waves?
Answer
Light behaves as electromagnetic waves that the human eye can perceive, with a wavelength range of about 400 to 700 nm, and a speed of 300,000 km/s.
Question
What is the form of energy that light represents?
Answer
Light is a form of energy that radiates equally in all directions and spreads over a larger area from its source.
Question
What are the frequencies less than visible light?
Answer
Radio, Infrared, Microwave
Question
What are the frequencies greater than visible light?
Answer
Ultra violet, Gamma, X-ray
Question
At what speed does light move?
Answer
300,000 km/s
Question
What is the range of wavelength for light visible to the human eye?
Answer
About 400 to 700 nm
Question
How does light radiate from its source?
Answer
Equally in all directions and spreads over a larger area