light & reflection quiz review

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Light & Reflection Quiz Review • Electromagnetic spectrum • Visible Light • The Law of Reflection & Plane Mirror Reflection • Concave and Convex mirror ray diagrams (SALT) • Magnification and Mirror equation

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Light & Reflection Quiz Review. Electromagnetic spectrum Visible Light The Law of Reflection & Plane Mirror Reflection Concave and Convex mirror ray diagrams (SALT) Magnification and Mirror equation. Electromagnetic Spectrum. Visible Light. Incandescent Light Fluorescent - PowerPoint PPT Presentation

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Page 1: Light & Reflection Quiz Review

Light & Reflection Quiz Review

• Electromagnetic spectrum• Visible Light• The Law of Reflection & Plane Mirror

Reflection• Concave and Convex mirror ray diagrams

(SALT)• Magnification and Mirror equation

Page 2: Light & Reflection Quiz Review

Electromagnetic Spectrum

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Visible Light• Incandescent Light• Fluorescent• Phosphorescent Light• Chemiluminescence-Bioluminescence • Triboluminescence• Electric Charge• LED (OLED)• Plasma Displays• Liquid Crystal Displays

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Law of Reflection

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Plane Mirror Reflection

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Concave & Convex Mirror Diagrams

• Concave and convex mirror uses• Real vs. Virtual images• Ray Diagrams:

– Behaviour of light when it hits a curved mirror– Vertex, Principal Axis, Center of Curvature, Focal

Point, Focal length, Normal– Characteristics and positions of images (SALT)

Page 10: Light & Reflection Quiz Review

Concave vs. Convex mirrorsWhen rays that are parallel to the principal axis strike a concave mirror, they are ALL reflected through the same point, called the focal point.

If several groups of parallel rays are reflected by a concave mirror, each group converges at a point.

Page 11: Light & Reflection Quiz Review

Concave vs. Convex mirrors• Concave mirrors are also called converging mirrors

• Concave mirrors are designed to collect light and bring it to a single point

• Examples: Cosmetic mirrors to produce an enlarged image, Telescopes to collect light from a distance source and focus it for viewing

• Concave mirrors can also be used to send out beams of light rays

• Examples: flashlights, car headlights, dental examination lights

Page 12: Light & Reflection Quiz Review

Concave vs. Convex mirrors

Page 13: Light & Reflection Quiz Review

Concave vs. Convex mirrors• Convex mirrors are also called diverging mirrors

• Convex mirrors spread out rays

• They allow you to view a large region that you could not see with a plane mirror of the same size

• Examples: Store security, parking lot safety, side-view mirrors, camera phones

Page 14: Light & Reflection Quiz Review

Real vs. Virtual• A real image is formed by light rays that converge at the

location of the image. • A real image can be projected onto a screen: If you place a

piece of paper at the spot where a real image forms, a focused image will appear on the piece of paper.

• A virtual image is any image formed by rays that do not actually pass through the location of the image.

• Light rays are not coming from where the image appears to be.

• Unlike a real image, a virtual image cannot be projected onto a screen.

Page 15: Light & Reflection Quiz Review

Curved mirror definitions• When parallel light rays strike a curved mirror, the reflected rays

eventually meet at a common point. The point where the light rays meet, or appear to meet, is called the focal point, F.

• The middle of a curved mirror is the vertex. The principal axis is an imaginary line draw through the vertex.

• The distance from the vertex to the focal point is the focal length, f. • The center of curvature, C, is the center of the circle that would be

formed if you extended the curve of the mirror.

The focal point is half way between the center of curvature and the vertex.

Page 16: Light & Reflection Quiz Review

Finding the imageEach time you find the image, you must determine the following:

•Size: Is it smaller, bigger, or the same size as the object?•Attitude: Is it upright or inverted?•Location: Is it behind or in front of the mirror?•Type: Is it real of virtual?

Page 17: Light & Reflection Quiz Review

Equations• Magnification

+/- M

• Mirror Equation– Positive focal length for concave mirrors– Negative focal length for convex mirrors

***SIGN CONVENTIONS