Lab report and pre lab assignments

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I have lab report needed to be done. And i pre lab assignments also

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Data Table Calculations Table Ray a e Angle Difference Reflection 1 30.5° 31.0° 0.5° 2 2 45.7° 44.5° 1.2° 3 60.0° 60.7° 0.7° Ray 04 n n an Refraction 1 52.5° 33.5° 27.0° 45.7° 1.507 2 60.8° 36.7° 23.0° 37.8° 1.515 1.504 0.007 3 69.00 38.5° 21.0° 32.0° 1.490 f(cm) R (cm) % Diff off % Diff R/2 Mirrors Concave fcon 1.75 4.5% 3.6 Convex fiv 1.80 1.7 % f(cm) Lenses Converging Lens 13.05 Diverging Lens 6.50 LABORATORY 40 Pie Laboratory Mama'. Loyd Reflection and Refraction with the Ray Box OBJECTIVES Investigate for reflection from a plane surface, the dependence of the angle of reflection on the angle of incidence Investigate refraction of rays from air into a transparent plastic medium. Determine the index of refraction of a plastic prism from direct measurement of incident and refracted angles of a light ray. Investigate the focal properties of spherical reflecting and refracting surfaces. EQUIPMENT LIST • Ray box, 60.0° prism, plano-convex lens, circular metal reflecting surfaces Converging lens, diverging lens, protractor, straightedge, compass Sharp hard-lead pencil, black tape, several sheets of white paper THEORY Reflection The reflection of light from a plane surface is described by the law of reflection, which states that the angle of incidence 0; is equal to the angle of reflection 0, The angles are measured with respect to a line perpendicular to the surface. Reflection from a plane mirror or a plane piece of glass are examples of the law of reflection. In Figure 40-1(a) several incident rays and reflected rays are shown for a plane surface. The angle of incidence 0, is seen to be equal to the angle of reflection 0 Refraction In general, light rays incident on a plane interface will be partially reflected and partially transmitted into the second medium. The transmitted ray undergoes a change in direction because the speed of light is different for different media. The ray is said to be refracted. This is illustrated in Figure 40-1(b). The angle of incidence is 0, and the angle of refraction is 02. The speed of light in a vacuum is c (3.00 x 108 m/s), the maximum possible speed of light. For any material the speed of light is v where v Sc. A quantity called the index of refraction n for any medium is COPYRIGHT 2008 THOMSON 2008 Tom Brokok part of the operation to the Starlegd Books ALPESERVED - oder muy be reproduced ordinary loma by wymus-, medades BROOKS COLE randevuma hermine the person the puble 401 Ron Perle Ray Ray2 2 Raya Raya Normal to Surface fa) Normal to Surface (b) Figure 10-1 llustration of reflection and refraction of light rays at a plane surface defined by c/o. Because the only allowed values of waren 1. The relationship (Snell's law) between the angle of incidence, and the refracted angle 8, is y sin - sin (Eq. 1) When , > Equation 1 implies that 8,
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REFLECTION AND REFRACTION
WITH THE RAY BOX

INTRODUCTION
In this laboratory we have conducted two experiments first one was reflection experiment to
check the relationship between angle of reflection and angle of incidence. The second one was
the refraction test. In this case we have conducted the experiment to check whether the Snell’s
law is validated. And the refraction of rays from air into a transparent plastic medium, the index
of refraction for given medium and the focal properties of spherical reflecting and refracting
surfaces also investigated in this laboratory session.

PROCEDURE
Reflection
1. All of the slits from the ray box (except the central slit) was covered by black type to
produce a single ray to investigate reflection and refraction from a plane surface.
2. Placed the prism with 600 angle on a piece of white paper and Drew a straight line along
the face of the prism and placed a small dot in the center of the line.

3. Placed the ray box about 15 cm away from the prism and adjusted incidence angle until to
be about 600.Drew a straight line with a edge in the path of the incident ray and the other
one in the path of the reflected ray and repeated that process two more times.
4. Constructed a normal at the point of the dot to the face of the p...


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