Waves
Optics
Mirrors and Lenses
Difflaction?
Misc
100
In a standing wave, this is the point at which there is complete destructive interference between the incoming and reflected wave and has no displacement from the resting point.
What is a node
100
This law states that the angle of reflection is equal to the angle of incidence
What is the Law of Reflection
100
This is the type of image you see when you look into the bowl of a spoon
What is real (and inverted)
100
Refraction occurs due to this change in the light wave.
What is wave speed
100
This is the speed of light.
What is 300 million m/s
200
Suppose two waves collide and the temporary combined wave that results is smaller than the original waves. What term describes this interaction?
What is destructive interference
200
This occurs when parallel light waves strike an uneven, rough surface, and reflect in many different directions
What is diffuse reflection
200
This type of lens is thicker in the middle and thinner on the sides
What is a convex lens
200
During this phenomenon, the wavelength must be __less/greater____ than the gap distance, otherwise straight waves are produced. (2 words)
What is diffraction and greater?
200
All sound waves are of this variety, due to the movement of their particles.
What is longitudinal
300
The period of a wave is 0.04 seconds. It travels at a velocity of 10.0 m/s. Determine the frequency and the wavelength of the wave.
What is f=1/T = 1/0.4s = 25Hz lambda = v/f = 10/25 = .4m
300
An incident ray in air (n=1.0) is approaching the boundary with an unknown material at an angle of incidence of 59.1°. The angle of refraction is 44.2°. Determine the index of refraction of the unknown material.
What is nr=1.23 (ni)sin(theta i) = (nr)sin(theta r)
300
If you know the focal length of a concave mirror, where should you place an object so that its image is upright and larger compared to the object?
What is f>do>0 (inside the focal length will produce an image that is upright, larger, and virtual)
300
Reflect, refract, or absorb.
What are the three ways waves interact with a boundary between two mediums?
300
A hiker shouts towards a vertical cliff 465m away. The echo is heard 2.75s later. a) what is the speed of sound of the hiker's voice in air?
What is 338m/s v=d/t = 2(465m)/2.75s = 338m/s
400
a)What is the speed of a periodic wave disturbance that has a frequency of 3.50Hz and a wavelength of 0.700m? b) What is the period of the wave?
a) What is 2.45m/s; v=lambda(f) = 0.700mx3.5Hz = 2.45m/s b) What is 0.28s; T=1/f = 1/3.5Hz = 0.28s
400
When light hits a boundary between two mediums with different indexes of refraction and no refraction occurs!!!
What is Total Internal Reflection or the light has an incident angle of zero degrees
400
A convex security mirror in a warehouse has a -0.50m focal length. A 2.0m-tall forklift is 5.0m from the mirror. What are the image position and image height? Draw a diagram with the mirror, object, image, and minimum of two principal rays.
What is di=-0.45m (Virtual) and hi=0.18m (upright and smaller) see pg472 in text
400
Bending of light
What is refraction?
400
This type of wave will travel regardless of medium, or lack thereof.
What is an electromagnetic wave?
500
This is an outcome used to predict the motion of celestial bodies (stars!). When a visible object is located very long distances from an observer, it will be observed to make a color shift throughout the visible spectrum of light as it gains distance from the observer. As the object becomes farther away, the color of the object becomes shifted toward the highest wavelength of light in the visible spectrum (red). This is called Redshift, and is the application of this phenomenon to light waves.
What is the Doppler Effect?
500
Draw and label a reflection diagram (label these parts: reflecting surface, incident ray, reflected ray, angle of reflection, angle of incidence, normal)
ask humble instructor...
500
Produce a ray diagram of an object placed 36.0cm in front of a concave mirror with a focal length of 16.0cm. Describe the image and find di.
What is di=28.8cm Real, smaller, inverted.
500
When the thunder comes from far distance, it will be heard as a (high/low) sound because (short/long) wavelengths can bend around obstacles to reach you.
What is low, long?
500
This is the approximate range of frequencies the human ear can detect Bonus: This is the approximate range of frequencies the human eye can detect
What is 20Hz to 20,000Hz Bonus: What is 430THz to 770THz.
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