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What does it mean for light to interact with matter?
The interaction of light and matter determines the appearance of everything around us.
What is refraction?
Refraction is the bending of light when it enters from one medium into another.
When light enters a different material, does its frequency change?
No. The frequency of light does not change. The frequency of light is determined by how this light was created.
Yes. Light travels at different speed in different materials.
When light enters a different material, does its speed change?
When light enters a different material, does its wavelength change?
Yes. As the light goes from one material into another:
If the wavelength of light changes when it enters a different material, does its color change?
No. The colors we see are determined by the frequency of light, and not the wavelength.
Which inventions are based on refraction?
Lenses use refraction to bend and focus light, creating an image. Lenses are used in many technologies, including eye glasses, microscopes, telescopes, cameras, and binoculars.
Why does a prism bend and separate light?
In math, a *prism* is a geometrical solid object whose two end faces are similar, equal, and parallel rectilinear figures. The sides of a prism are parallelograms. The type of prism used to separate w…
What is the *index of refraction*?
The index of refraction in a medium is defined as
The index of refraction of a medium depends on:
Which factors determine the index of refraction of a medium?
What is dispersion?
Dispersion is the spreading out of refracted light according to color.
a wave is bent due to a change in speed
When you look under water, the light does not travel in a straight line. This is an optical illusion. It only happens when the light refracts.
A substance through which a wave can travel.
White light turning into ROY G BIV. Example, refraction is responsible for rainbows.
...a curved piece of glass or other transparent material that refracts light.
..., the point at which light rays parallel to the optical axis meet when reflected or refracted
Sign Conventions for Lenses
..., a lens that is thicker in the middle than at the edges
`, an image of an object formed by light rays that actually come together at a specific location
a reflected optical image; see "inverted image"
..., a lens that is thinner in the middle than at the edges
mainly convex lenses, and are eyes
things that help people make observations.
an optical instrument that is used to record images
an optical instrument that is used to see things at a far distance
an optical instrument that us used to see things close up even closer
/ Refraction of light can create optical illusions and can separate white light into different colors/ lenses form images by refracting light, convex lenses produce both real image and virtual images/ a magnifying glass and the lens of the human eye are convex lens/ concave lenses produce only virtual images/ Cameras, telescopes, and microscope are optical instruments that use lenses to form images"
How does light travel in straight lines?
Light travels in straight lines if the medium through which the light travels does not change
How are optical illusions created
they are created through refraction of light
What three optical phenomena come from refraction of light?
optical illusions, images being formed by lenses, and white light being separated into different colors
animal eyes, and magnifying glasses
What are 2 examples of convex lenses
cameras, telescopes, and microscopes
What are 3 examples of concave lenses
what is the magnification given by a 5x lens used with a 20x lens
What's the difference between a digital camera and a 35 mm camera
a 35mm camera has a film, and a digital camera has light sensors
a piece of glass that separates white light into ROY G BIV
When a wave reaches a boundary between two _______, some wave bounces back into the first material. The return of a wave back into its original material is called reflection.
When a wave reaches a boundary between two materials, some wave _______ back into the first material. The return of a wave back into its original material is called reflection.
a wave strikes a boundary and bounces back
Usually waves are partly _______ and partly refracted when they fall on a transparent material.
Usually waves are partly reflected and partly _______ when they fall on a transparent material.
Usually waves are _______ reflected and _______ refracted when they fall on a transparent material.
All light passes through; can see through clearly eg. glass
When a wave that is traveling at an _______ changes its speed upon crossing a boundary between two materials, it bends. This bending is called refraction.
Units: cm/s, m/s, mi/hr, km/s ...
When a wave that is traveling at an angle changes its speed upon crossing a _______ between two materials, it bends. This bending is called refraction.
When a wave that is traveling at an angle changes its speed upon crossing a boundary between two materials, it _______. This bending is called refraction.
small portion of the electromagnetic spectrum that our eyes are capable of seeing
Refraction is caused by changes in the speed of light as it passes from one _______ to another.
A freight car moves along a frictionless level railroad
2.rule of refraction
A line drawn at right angles to the reflecting surface at the point where the incidence ray hits; All angles are measured from here
As temperature increases, the vapor pressure of a liquid _______.
When light rays enter a material in which their speed increases, the rays bend _______ normal.
a light object with a large surface area is (more/less) affected by the drag force than a more compact object is when both objects are falling
A point toward something, determined by its orientation and sense.
The angle of incidence and angle of refraction are both _______ from the normal
Light travels as fast as it can _______ go in air. This speed is 300 million m/s, and is labeled c.
300 million m/s
Light travels as fast as it can possibly go in air. This speed is _______, and is labeled c.
The specific heat capacity in J/g K
The _______ of refraction n is defined as , where c is the speed of light in air, and v is the speed of light in a material.
The index of refraction n is defined as _______, where c is the speed of light in air, and v is the speed of light in a material.
The index of refraction n is defined as , where c is the speed of light in air, and _______ is the speed of light in a material.
a macroscopic characteristic of a system that is independent of path (or process)