PHYS 2002 Exam 3 Questions and Answers Already Passed Latest Update

PHYS 2002 Exam 3 Questions and Answers Already Passed Latest Update Properties of an Image - Answers 1. The image is upright/upside down 2. The image is reduced or enlarged 3. The image is located behind the mirror or in front of mirror 4. The image is inversed Paraxial rays that strike a concave mirror are reflected _______ the principle axis - Answers toward Paraxial rays that strike a convex mirror are reflected _______ the principle axis - Answers away What does it mean when an image is real? - Answers Rays intersect and form the image What does it mean when an image is virtual? - Answers You have to extrapolate the rays and trace it back to form an image f for Concave mirrors - Answers positive f (f= 1/2 R) f for Convex mirrors - Answers negative f (f = -1/2 R) Three special rays for concave mirror - Answers 1. Paraxial ray from the object that passes through the focal point upon reflection 2. A ray from the object that passes through the focal point and reflects parallel to the principle axis 3. A ray from the object that passes through C and reflects and retraces its original path The object is located beyond C (concave mirror) - Answers 1. Real 2. Inverted 3. Reduced The object between C and f (concave mirror) - Answers 1. Real 2. Inverted 3. Enlarged The object is located inside f (concave mirror) - Answers 1. Virtual 2. Upright 3. Enlarged Three special rays for convex mirrors - Answers 1. A paraxial ray from the object reflects as if originating from f 2. A ray from the object that heads towards f and gets reflected parallel principle axis 3. A ray from the object heads towards C and gets reflected back along same path as if it originating from C Where is the f and C located relative to the convex mirror? - Answers Behind the mirror The object and a convex mirror - Answers 1. Virtual 2. Upright 3. Reduced If m 1 then the image is ... - Answers enlarged If m 1 then the image is ... - Answers reduced If m is positive then the image is ... - Answers upright If m is negative then the image is ... - Answers inverted Real images are ... (inverted or upright) - Answers inverted Virtual images are ... (inverted or upright) - Answers upright Focal Length Sign Convention - Answers f is + for concave f is - for convex Object Distance Sign Convention - Answers d0 is + if the object is in front of the mirror d0 is - if the object is behind the mirror (occurs when trying trying to form images with multiple mirrors) Image Distance Sign Conventions - Answers di is + if the image is in front of the mirror (real image) di is - if the image is behind the mirror (virtual image) What are the image properties of a convex mirror always? - Answers Upright, reduced and virtual As light passes though different media, what stays the same but what changes? - Answers frequency stays the same but the wavelength and speed change as well When light refracts, what makes it bend towards the normal? - Answers Less dense medium to a more dense medium (low n to high n) When light refracts, what makes it bend away from the normal? - Answers More dense medium to a less dense medium (high n to low n) What is n1 and n2 in the apparent death? - Answers n1 = incident ray n2 = refracted ray Refracted vs Reflected Ray - Answers Law of Reflection (angle of i = angle of reflected) Snell's Law (n1 sin1 = n2 sin2 for refracted) If you change the incident angle then you change the ... - Answers refracted and reflected angles Critical angle - Answers the angle of incidence that produces an angle of refraction of 90 degrees angle i = angle c when angle refracted (angle 2)= 90 degrees What happens when the incident angle is greater than the critical angle? - Answers Then t