test 3

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Questions and Answers

Match the scientists with their contribution to understanding light:

Al-Haytham = Accurately described how vision works and diagrammed the eye. Euclid = Came up with the law of reflection. Ole Romer = First measured the speed of light. Pythagoras = Believed beams of light came from our eyes.

Match the optical instruments with their primary functions:

Refracting Telescope = Uses lenses to gather and focus light. Reflecting Telescope = Uses mirrors to gather and focus light. Microscope = Allows for detailed viewing by combining at least two lenses. Magnifying Glass = Uses a convex lens.

Match the property of light with its definition:

Reflection = The change in direction of light when it bounces off a surface. Refraction = The bending of light when it passes from one medium to another. Light Year = The distance light travels in one year. Intensity = The amount of light.

Match the type of material with how light interacts with it:

Transparent = Allows light to pass through. Translucent = Allows some light to pass through, some blocked. Opaque = Permits no light to pass through. Luminous = Gives off light. Signup and view all the answers

Match the type of reflection with its surface:

Regular Reflection = Light hits a smooth surface. Diffuse Reflection = Light hits a rough or uneven surface. Law of Reflection = States that the angle of incidence is equal to the angle of reflection. Normal = An imaginary line, used to measure angles from, perpendicular to the mirror at the point of reflection. Signup and view all the answers

Match the mirror type with the description about its surface:

Concave Mirror = Has a surface that curves inward like a bowl. Convex Mirror = Has a surface that is curved outwards. Focal Point = Parallel rays that hit a concave mirror reflect and head to a common point. Virtual Image = A reflected image seen in a convex mirror; will always appear upright and smaller. Signup and view all the answers

Match properties to an image created with a convex lens:

The object is far away = Image is inverted and smaller. The object gets closer to the Focal Point = Image grows larger. The object is between the Focal Point and the lens = Image becomes upright and larger. Focal Point = Parallel rays travelling through a convex lens will refract and create one of these. Signup and view all the answers

Match the lenses to how it refracts light:

Convex = Is thicker in the middle than at its edges. Concave = Is thinner in the middle than at its edges. Signup and view all the answers

Match angles to their definitions:

Angle of Incidence = The angle between the incident ray and the normal. Angle of Reflection = The angle between the reflected ray and the normal. Transparent Substances = Refract light. Vacuum = Light travels fastest in this. Signup and view all the answers

When light travels from one medium to another, it can change speed. Match where it has to:

Less dense medium to a more dense medium = Light slows down. More dense medium to a less dense medium = Light speeds up. When light travels at an angle from one medium to another = Light bends. Refract = The more dense the medium, the more the light will do this. Signup and view all the answers

Match what the following scientist demonstrated or suggested:

Euclid = Discover/ suggested 2 things. Isaac Newton = Demonstrated something (referencing experiment). Michelson = Measured the speed of light quite accurately. Signup and view all the answers

Match the type of material with how light travels through it:

Transparent = Transmits light. Translucent = Blocks some light. Opaque = Blocks all light. Normal = Changes the angle relative to the surface. Signup and view all the answers

Match the lens surface with the direction it spreads light:

Concave lens: = Spread light out. Smooth surface: = Allows light to bounce off as a parallel beam, giving a ...... Mirrors surface: = Are made of glass with a thin film of ...... applied to the back. Light: = Travels in straight lines until it strikes a surface where it is either transmitted, reflected, or absorbed. Signup and view all the answers

Match the mirror surface with the image that it forms:

Concave = Is used in flashlights. Convex = Draw rays on the diagram below to show how this person's image appears smaller in this mirror. Signup and view all the answers

Match the location of an object relative to a concave mirror with the corresponding image properties:

If the object is far away from the mirror = The reflected rays form an ...... image. As the object gets to the ...... the image becomes = mirror. If the object is between the ..... and the mirror. = Image properties become ...... and ....... . The shape of an object .... = determines properties of the resulting image. Signup and view all the answers

Match the description when light travels at an angle from one medium to another, or ......, caused by changes in the

Refraction (or bending) = Changes in the speed of light. Light travels at = Different speeds depending on the medium. When the incident ray travels from less ..... = And refraction occurs. In a vacuum Light travels at ..... = Its highest speed. Signup and view all the answers

Match the type of lens and how it works.

On a convex lens = The beam can become focused. On a lens = Light is bent. In a convex lens the ..... meet on a plane = Point The beams are bent at ...... that can be drawn out = The Lens border Signup and view all the answers

Match the function with material property:

When light travels from one medium to another = there is bending When light is dispersed in an uneven fashion = there is light scatter When light is focused = there is brightness A microscope combines = lenses Signup and view all the answers

Match the property with its function:

Focal length is the same = for all wavelengths Focal length is different = depending on wave length For a telescope the quality of pictures depends on = the condition of the media For vision the quality of sight depends on = the state of the eye. Signup and view all the answers

Match the diagram to the type of ray bending.

Light comes in straight and = light rays are produced. light rays hit and = they scater. light rays pass through and appear with = slight deviation. Signup and view all the answers

Match the materials:

transpararent windows = allow vision. lenses = are curved opaque materials = block. convex = lenses are thinner in middle Signup and view all the answers

Match the materials, where the light can exist.

light travels and it exists = everywhere. materials are identified because = they reflect or transmit or absorb light. for concave material the image may appear = larger depending on distance. for convex material the image may appear = smaller and upside down. Signup and view all the answers

Match the material name to function:

refraction = the phenomena where the light and medium are distinct. transparent film = there is almost no deviation. more layers = may produce multiple lines. thinner layer = produces a single line. Signup and view all the answers

Flashcards

Ole Romer

First measured the speed of light.

Albert A. Michelson

Measured the speed of light more accurately.