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Chapter 31: Diffraction and Interference Questions
Chapter 31: Diffraction and Interference Questions
18
Physics
01/08/2012

Term
 ______________________ of light is the bending of light by means other than reflection or refraction.
Definition
 Diffraction
Term
 What principle states that every point on a wave front acts like a point source of secondary wave lengths?
Definition
 Huygen’s principle
Term
 Diffraction can be _______________ using the Huygen’s principle.
Definition
 understood
Term
 Diffraction is greatest for waves that are ___________ compared with the size of the obstruction.
Definition
 long
Term
 ___________ of light is the combining of single frequency light from two parts of the same beam so that crest overlaps crest or crest overlaps trough.
Definition
 Interference
Term
 The colors seen in soap bubbles are due to ____________ interference of different frequencies
Definition
 destructive
Term
 _______________ are three-dimensional pictures created through the interference of two parts of a laser beam.
Definition
 Holograms
Term
 A series of closely spaced parallel slits or grooves that are used to separate colors of light by interference is called _____________ _____________.
Definition
 diffraction grating
Term
 Define: monochromatic
Definition
 Single color or frequency
Term
 Name the phenomenon whereby interference of light waves of mixed frequencies reflected from the top and bottom of thin films produces a spectrum of colors.
Definition
 Iridescence
Term
 Light waves having a jumbled mixture of frequency, phase, and direction are called ________________.
Definition
 incoherent
Term
 13. Light waves having identical frequency, identical phase, and traveling in the same direction are called ____________.
Definition
 coherent
Term
 An optical instrument that produces a beam of coherent light is called a _________.
Definition
 laser
Term
 In this case how does light produce color: yellow banana
Definition
 selective reflection
Term
 In this case how does light produce color: blue sky
Definition
 scattering
Term
 In this case how does light produce color: rainbow
Definition
 refraction
Term
 In this case how does light produce color: peacock feather
Definition
 diffraction
Term
 In this case how does light produce color: soap bubble
Definition
 interference
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