AP Physics Mr. Jean February 24 th, 2012. The plan: Optics & Theory AP Booklet Physics Competition –Sir Issac Newton –CAP High School Competition Optics.

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Presentation transcript:

AP Physics Mr. Jean February 24 th, 2012

The plan: Optics & Theory AP Booklet Physics Competition –Sir Issac Newton –CAP High School Competition Optics & Calculations Quest –Quest Assignment #1

AP Booklet:

Physics Competitions:

Readings for today’s class Chapter 23 –P.632 to 642

Diverging Mirrors: A diverging lens will cause rays parallel to the principal axis to radiate from a virtual focus. Rays passing through the center are not deflected.

Reflection in Curved Mirrors:

Focal Point: The focal point is the point in space at which the reflected light meets along the principal axis.

Option #1: Behind C.

Option #2: In front of C.

Concave Mirrors: Two Rules Any incident ray traveling parallel to the principal axis on the way to the mirror will pass through the focal point upon reflection. Any incident ray passing through the focal point on the way to the mirror will travel parallel to the principal axis upon reflection.

In General:

Mirror Equation Terms: f = focal length (m) r = radius of curvature (m) d 0 = objective distance (m) d i = image distance (m) m = magnification of a mirror, which is defined as the height of the image. h i =image height (m) h o = object height (m)

More common notation: p = object location (m) q = image location (m) h ’ = image height (m) h = object height (m)

Mirror Equation: Chapter 23 – Page 639

Magnification of a curved mirror: Chapter 23 – Page 639

Concave Mirrors: When light enters from a very far distance object we can use a very nice approximation. f = r / 2

Flat Mirror Example: A person wishes to take a picture of themselves through a mirror. If the camera is 1.7m in front of the mirror, at what distance should the camera lens be focused to?

Concave Mirror: A concave mirror with a radius of curvature of 0.75m is illuminated by a candle located on the symmetry of axis 2.75m from the mirror. Where is the image of the candle?

Convex Mirror: An object is 15 cm from the surface of a reflective spherical Christmas-tree ornament 6cm in diameter. What is the position of the image?

Quest Course Name: AP_Phy Unique Name: AP_Phy_MHS_2012 –Register for this course. –Assignment #1 Optics Due on March 9 th, 2012