Principles of Light, Electromagnetic Spectrum, Visible and Invisible Light Flashcards
The two theories of light that we primarily discuss are the:
corpuscular theory and the electromagnetic wave theory
If an object next to a light source casts a shadow, what theory of light are we discussing?
Corpuscular theory
Which theory explains how a rainbow is formed and how light is dispersed through a prism?
Electromagnetic wave theory
What is the size of a nanometer compared to a meter?
A nanometer is 1 billionth (10^-9) of a meter
The relationship of wavelength and frequency determines the velocity of light. What is the formula?
V=λf
What is the speed of light in air?
1.86 x 10^5 miles/second
A single band of light from a single point on a light source is called a:
ray
What is the wavelength range of the visible spectrum?
380 nm to 750 nm
Which category of invisible light is the major cause of skin and ocular damage?
UV-A
Which color has the longest wavelength?
Red
How is the wavelength of light measured?
From crest to crest or trough to trough
Who introduced the electromagnetic wave theory?
Maxwell
Why do we see a banana as yellow?
Because the cones in our eyes receive the light waves. The eyes see the reflection of the color.
What does HEV stand for?
High Energy Visible
Why is the sky blue?
The blue wavelength scatters the most
