Chapter 16 Final Flashcards
In a vacuum, the speed of light is _________
3 x 10^8 m/s
Interference between two waves can produce a wave that has a ________
Larger amplitude or smaller amplitude
What involves waves changing direction?
Refraction, diffraction and reflection
Draw a longitudinal wave and a transverse wave in the space below. On each wave, indicate the wavelength. On the transverse, indicate the amplitude
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How can you determine the frequency of a wave?
The frequency can be known by counting the number of wavelengths that go past a point in a certain amount of time. The equation for frequency is, frequency = 1/T
What affects the speed of sound?
temperature
What affects the loudness of a sound?
Intensity of the waves
What affects the pitch of a sound?
Frequency of the waves
Nerve fibers send an impulse to the brain when the waves reach the ___________
Cochlea
To hear, what takes place?
The ear sense vibrations in the air
The ear amplifies the vibrations
The ear transmits signals to the brain
What causes the sound of a guitar to get louder as it is played?
resonance
What is used to measure distance?
Ultrasound
Sonar uses __________
Ultrasound
What device uses sound waves to view organs inside the body?
Sonogram
Because its molecules are far apart, sound waves will travel slowly through ________
cold air
Light demonstrates wave characteristics when it is ________
Reflected, refracted and diffracted.
Light demonstrates particle characteristics when it __________
Knocks electrons off a metal surface
As the frequency of light waves increases, __________
The energy increases
The rate at which energy flows through a given space describes light ___________
Intensity
Electromagnetic waves that give off heat
Infrared rays
Electromagnetic waves that can carry telecommunication signals and cook food
Microwaves
Electromagnetic waves with high energy that can cause sunburn
Ultraviolet rays
Electromagnetic waves used in medicine to kill cancer cells and view bones
X rays and gamma rays
Electromagnetic waves used for television, AM, and FM radio signals
Radio waves
Electromagnetic waves used to determine the location of objects in a room
Visible light
Light rays reflecting off a smooth surface reflect ______
In one new direction
Light rays reflecting off a rough surface reflect ________
At all angles
The law of reflection says the angle of incidence is _________ the angle of reflection.
Equal to
Reflection of light into random directions is called
Diffuse reflection
A virtual image ___________
Appears behind a mirror
An apple appears red to your eye because it _______
Reflects red light
When you look in a convex mirror, the image appears
Smaller than it really is
In addition to reflecting some light, every object
Absorbs some light
A real image can be formed using a
Concave mirror
When all three additive primary colors are mixed, you see the color
White
When light moves from a material in which its speed is higher to one in which its speed is lower, the ray is
Bent toward the normal
A mirage is caused by
Refracting light
Light entering the eye is focused to produce an image on the
Retina
A prism separates white light into different colors through a process called
Dispersion
The increase of an object’s apparent size by using lenses of mirrors
Magnification
Consists of two or more plane surfaces of a transparent solid at an angle with each other
Prism
A transparent object that refracts light waves such that they converge or diverge to create an image
Lens
A lens that bends light waves inward
Convergent lens
Bending of light when crossing between mediums
Refraction
A lens refracting light waves so that they bend outward
Divergent lens
Sound waves are examples of _____________
Longitudinal waves
