Explore Our Catalogs. The Basic Optics Light Source provides a point source and an extremely bright crossed arrow target. Use free-standing or easily clip directly to Basic Optics Track.
Rotate the selector knob to choose between rays 1, 3, or 5 or the primary color mask. Qty: Add to Cart. What's Included. Description Buying Guide Experiments Documents. By turning the box to a different side, it becomes a: Crossed Arrow Object with Metric Scale: ideal for showing images, focal point, and magnification. Bright Point Source: The very small filament of the halogen bulb provides an excellent point source for experimenting with shadows or the Inverse Square Law.
Three Primary Colors Source: The red, green, and blue filters provide three rays of light that are easily combined with a lens for color mixing. One, Three or Five Ray Sources: Just rotate the knob in front of the light source to vary the number of rays produced. Ray Optics Kit. Optical Fiber Model. Demonstration Mirror, Convex. The relative light intensity versus distance from a point light source is plotted.
As the Light Sensor is moved by hand, the string attached to the Light Sensor that passes over the Rotary Motion Sensor pulley to a hanging mass The purpose of this activity is to determine the relationship between object distance and image distance for a thin convex lens.
Use a light source, optics track, lens, and viewing screen to measure object distance, image distance, Explore Our Catalogs. Components from the Ray Optics Kit showing refraction and reflection.
Rotate the selector knob to choose between rays 1, 3, or 5 or the primary color mask. Note that the rays diverge. The primary color mask allows experiments in color addition using components from the Ray Optics Kit. Qty: Add to Cart. What's Included. Features Optics Track 1.
The metric tape makes position measurements easy. Optical alignment is always a snap. Light Source: Has a lighted crossed arrow target with metric scale for focusing images through lenses or using with the concave mirror. Acts as a point light source, 1, 3, or 5 parallel rays, or red-green-blue rays. Adjustable Lens Holder: Use your own lenses from 19 mm to 75 mm in diameter or choose from our lens sets. Storage tray functions as a water tank for the hollow lens. Includes D-shaped acrylic lens.
Viewing Screen: White plastic screen snaps into the optics bench - the position of the screen is visible on the bench scale.
Experiment Manual: The experiment guide includes 17 ready-to-use optics experiments with teacher notes and sample data. Storage Box: Everything fits neatly into the protective storage box, with the exception of the 1. Distance The relative light intensity versus distance from a point light source is plotted and compared to theory.
Polarizer Demonstrator. Repeat steps 1—4 for the convex mirror. Note that in step 3, the reflected rays will diverge, and they will not cross. The focal point is where these extended rays cross.
What is the relationship between the focal length of a cylindrical mirror and its radius of curvature? Do your results confirm your answer? What is the radius of curvature of a plane mirror? The purpose of this experiment is to determine the index of refraction of the acrylic trapezoid.
Place the light source in ray-box mode on a sheet of white paper. Place the trapezoid on the paper and position it so the ray passes through the parallel sides as shown in Figure 4. Mark the position of the parallel surfaces of the trapezoid and trace the incident and transmitted. Carefully mark where the rays enter and leave the trapezoid. Remove the trapezoid and draw a line on the paper connecting the points where the rays entered and left the trapezoid.
This line represents the ray inside the trapezoid. Choose either the point where the ray enters the trapezoid or the point where the ray leaves the trapezoid. At this point, draw the normal to the surface. Both of these angles should be measured from the normal. Record the angles in the first row of Table 4. On a new sheet of paper, repeat steps 2—6 with a different angle of incidence. Repeat these steps again with a third angle of incidence.
The first two columns of Table 4. For each row of Table 4. Average the three values of the index of refraction. What is the angle of the ray that leaves the trapezoid relative to the ray that enters it? Position the trapezoid as shown in Figure 5. Rotate the trapezoid until the emerging ray just barely disappears.
Just as it disappears, the ray separates into colors. The trapezoid is correctly positioned if the red has just disappeared. Mark the surfaces of the trapezoid. Mark exactly the point on the surface where the ray is internally reflected. Also mark the entrance point of the incident ray and the exit point of the reflected ray.
Remove the trapezoid and draw the rays that are incident upon and reflected from the inside surface of the trapezoid. See Figure 5. Measure the angle between these rays using a protractor. Extend these rays to make the protractor easier to use. Note that this angle is twice the critical angle because the angle of incidence equals the angle of reflection. Record the critical angle here:. Exit point. R eflection Entran ce po int point. Record the theoretical value here:. Is the critical angle greater for red light or violet light?
What does this tell you about the index of refraction? In this experiment, you will explore the difference between convex and concave lenses and determine their focal lengths. When parallel light rays pass through a thin lens, they emerge either converging or diverging. The point where the converging rays or their extensions cross is the focal point of the lens. The focal length of the lens is the distance from the center of the lens to the focal point.
If the rays diverge, the focal length is negative. Place the light source in ray-box mode on a white sheet of paper.
Turn the wheel to select three parallel rays. Shine the rays straight into the convex lens see Figure 6. Note: The lenses used in this experiment have one flat edge. Trace around the surface of the lens and trace the incident and transmitted rays. The point where the outgoing rays cross is the focal point of the lens. Measure the focal length from the center of the lens to the focal point. Record the result in Table 6. Repeat the procedure with the concave lens. Note that in step 3, the rays leaving the lens are diverging and do not cross.
Use a ruler to extend the outgoing rays straight back through the lens. Remember to record the focal length as a negative number. Nest the convex and concave lenses together and place them in the path of the parallel rays see Figure 6. Trace the rays. Are the outgoing rays converging,. What does this tell you about the relationship between the focal lengths of these two lenses?
Slide the convex and concave lenses apart by a few centimeters and observe the. Then reverse the order of the lenses. Trace at least one pattern of this type. What is the effect of changing the distance between the lenses? What is the effect. In this experiment you will explore how the properties of a lens are related to its shape, its index of refraction, and the index of refraction of the surrounding medium.
A conventional lens is made of a material whose index of refraction is higher than that of the surrounding medium. For instance, the lenses in a pair of eyeglasses are usually made from glass or plastic with an index of refraction of 1. The index of refraction of water is about 1.
The hollow lens in this experiment has three sections: a plano-con- cave section and two plano-convex sections. We will refer to these as sections 1, 2, and 3 see Figure 7. You will determine whether each section acts as a converging or diverging lens when it is a filled with water and surrounded by air and b filled with air and surrounded by water.
Before you test the hollow lens, make some predictions: For every configuration in Table 7. Record your predictions in the table. Turn the wheel to select five parallel rays. Fill section 1 with water and place the lens in front of the light source so the parallel rays enter it through the flat side.
Do the rays converge or diverge after passing through the lens? Record your observation in Table 7. Repeat this step with water in different section of the lens to complete the first. Put the white plastic sheet in the transparent ray-optics box. Put the hollow lens in the box on top of the sheet as shown in Figure 7. Place a small weight on top of the lens to stop it from floating.
Position the light source outside of the box so that the rays enter the hollow lens through the flat side. Fill the box with water to just below the top of the lens. Repeat this step with air in different section of the lens to complete Table 7.
Under what conditions is a plano-convex lens converging? Under what conditions is it diverging? If a plano-concave lens of an unknown material is a diverging lens when surrounded by air, is it possible to know whether the lens will be converging or diverging when placed in water?
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