Optics Research laboratory:
Mirrors and Lenses
Theodore Gotis
Oakton Community College or university
(revised 7/21/11 J)
We. Introduction and Objectives
II. Equipment Required
Ray BoxConcave LensCompass
Aircraft MirrorConvex LensProtractor
Concave MirrorPrismRuler
Convex MirrorWater Tray
3. Theory
Ray diagrams
Key length
Radius of curvature
Law of reflection
Snell's Law (Refraction)
Total Interior Reflection
IV. Experimental Method
A. Planes Mirrors
1 ) Use a ruler to draw a straight line on one part of a sheet of paper near the center, then bring a verticle with respect line throughout the center of the first collection. 2 . Fall into line the front advantage of the airplane mirror with the straight range so that the perpendicular is at the middle of the reflect.
Figure 1: Plane Looking glass
Beam Box
Episode Ray Aircraft Mirror
Cavite Mirror ( Perpendicular to the Plane Looking glass
Reflected Ray
several. Using the concave mirror from your mirror and lens set up, cover up all but one of the light coming from the beam box. some. Now aim this sole beam of light at an angle ( among 30(and 60( from the perpendicular to the plane mirror, and trace the incident and reflected beams of light with a pencil. 5. By using a protractor, measure the angle ( between the incident ray plus the perpendicular for the plane reflection. Do the same for the reflected beam. 6. Now repeat Methods #4-6 for 2 more occurrence beams of light between 10( and 80(
Data Table one particular: Plane Mirror
|Angle of Incident Beam |Angle of Reflected Ray | | | | | | | | |
7. Publish an equation on the line under describing the partnership between the aspects of the episode beam and reflected beam of light from the verticle with respect to the airplane mirror. (Yes, it is as easy as you think. )
____________________=______________________
B. Spherical Mirrors (Funhouse Mirrors)
CURVY MIRROR
Curvy spherical mirrors behave similar to the showcases used in highlighting telescopes, they direct rays of light to a focus in front of the mirror. Highlighting telescopes basically use parabolic mirrors to assure that all the rays are directed to similar focus. Circular aberration happens when all of the rays are not directed to similar focus. Guess which type of mirror is well know for circular aberration, spherical mirrors or parabolic mirrors?
1 . Find the shape of the concave mirror on one aspect of a sheet of daily news using the looking glass provided. In that case line up the mirror on the curve you traced just like you performed with the planes mirror. 2 . Place the zoom lens that is convex on one area and level on the other in front of the beam box in order that the rays giving the box are parallel to each other. Then target the sun rays at the concave mirror in order that all the light converge exact same focus. (Remember that you need to give attention to the light in the centre portion on the mirror since in general its not all ray jogging parallel for the principal axis will be reflected through the same focal point. Most incoming seite an seite rays will converge for the same point only when the arc entire mirror is usually smaller than the radius of curvature or if the reflection is parabolic. )
Determine 2: Curvy Mirror
Ray Box Concave Mirror
Perpendicular
3. Trace all episode and reflected rays, implying the path of the light...
