CN2368108Y

CN2368108Y - Analog demonstration instrument for reflection law and refraction low of light

Info

Publication number: CN2368108Y
Application number: CN 98250525
Authority: CN
Inventors: 荀洪亮
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-16
Filing date: 1998-12-16
Publication date: 2000-03-08
Anticipated expiration: 2008-12-16

Abstract

The utility model relates to a movable teaching aid that can simulate and demonstrate the reflection law and the refraction law of light. The upper part of a thin plate that is coated with two colors (for representing two light media) is provided with three strips of metal sheets that are provided with arrow signs (for representing the propagation direction of light), and the metal sheets are used for representing incident ray, reflection ray, and refracted ray. The back face of the utility model is provided with a regulating handle for teachers to change the sizes of incident angles, and the reflection ray and the refracted ray are affected by connecting rods to change propagation directions according to the reflection law and the refraction law, so that the reflection law and the refraction law of light can be clearly and easily simulated and demonstrated.

Description

Reflection of light law, refraction law simulated demonstration instrument

The utility model relates to the apparatus for demonstrating of a kind of simulated reflections law, refraction law.

At present, used reflection of light law, the apparatus for demonstrating of refraction law in the teaching, majority is with ordinary ray, undertaken by some utility appliance, often two media is outstanding inadequately, under normal illumination, poor visibility is added the knowledge of the solid geometry that student that complicated spatial structure and two laws relate to do not acquire, and brings certain difficulty to teaching.

The purpose of this utility model provides the apparatus for demonstrating of a kind of simulated reflections law, refraction law, light really, and represent light with the bonding jumper that scribbles bright-colored, with to two kinds of more intense color showing two medias, add better simply structure, bigger size, regulating device makes the demonstration of this two law that better effect be arranged flexibly.

The purpose of this utility model is achieved in that and is scribbling two kinds of colors (two kinds of media of expression light), be carved with on the sheet metal of two gathering sills, load onto the three strip metal bars that scribble bright-colored and (top an arrow is housed respectively, the direction of propagation of expression light), by four connecting rods and adjusting handle, the direction of propagation of regulating light changes, and carries out analog demenstration and explanation reflection of light law and refraction law by the plane at sheet metal place.

The all available metal sheet of sheet metal in this simulated demonstration instrument, bonding jumper, connecting rod and adjusting handle is made.

Below in conjunction with drawings and Examples the utility model is further specified

1-mainboard 2,3-gathering sill 4-" incident ray " 5-" reflection ray "

6-" refracted ray " 7,8,9,10-connecting rod 11,12-rotating shaft

13,14-adjusting handle 15,16-broken line, 17-embedding tongue

Fig. 1 is the main sheet metal of the utility model embodiment, and wherein upper and lower therefrom edema with the heart involved is divided equally open, be coated with different colours to represent two media and on the separatrix, indicate " interface " printed words, on carve two gathering sills 2,3.A perpendicular dotted line is drawn at the center of crossing, and indicates " normal " printed words.

Fig. 2 is the front view (FV) of an embodiment of the present utility model, wherein " incident ray " 4, " reflection ray " 5, " refracted ray " 6, with a rotating shaft see through sheet metal 1 the center, link together, they can freely be rotated in the plane at sheet metal 1 place separately, connecting rod 7,8,9 is isometric, connecting rod 10 to 7,8,9 is slightly long, and add a rotating shaft 11 apart from right-hand member 1/3 place at connecting rod 10, when demonstrating the refraction angle less than incident angle, refracted ray is connected in the rotating shaft 12, when demonstrating the refraction angle, " refracted ray " is connected in the rotating shaft 11 greater than incident angle.The upper end of connecting rod 7,8 links together by the adjusting handle 13 usefulness rotating shafts of gathering sill 2 with the back side, the lower end is connected on 2 of A, the B of " incident ray " 4 and " reflection ray " 5 with rotating shaft respectively, making quadrilateral OABC is a rhombus, the right-hand member of connecting rod 9,10 links together by the adjusting handle 14 of gathering sill with the rotating shaft and the back side, left end is connected the B point of " reflection ray " 5 and the D point of " refracted ray " 6 with rotating shaft respectively, and the angle that makes " refracted ray " 6 and normal is less than the angle of " incident ray " 4 with normal.Base adopts the base part of sheet metal is cut two perps, and wherein center section is rolled over 90 degree backward, and two end portions is rolled over 90 degree forward, also can follow closely on this basis on a horizontal plank.

Fig. 3 is the back view of embodiment, and " incident angle ", " reflection angle ", " refraction angle " reduce together when upwards drawing adjusting handle 13, and when drawing adjusting handle 14 to the right, " incident angle ", " reflection angle ", " refraction angle " all increase together.

Fig. 4 is the shape figure of adjusting handle, wherein upwards rolls over 90 degree along broken line 15, along broken line 16 folding 90 degree downwards, and embedding tongue 17 is embedded in the gathering sill, and can be in gathering sill flexible motion.

Claims

1, a kind of can analog demenstration reflection of light law, the movable teaching aid of folding body law, be carved with two gathering sill thin plate fronts at one, load onto three expressions " incident ray ", the bonding jumper of " reflection ray ", " refracted ray "; The arrow of the direction of propagation of expression light is housed on the bonding jumper; Three strip metal bars are linked mutually by four connecting rods; The back side has two adjusting handles it is characterized in that: at the center of a mainboard of vertically placing, by a rotating shaft, the end that to represent three bonding jumpers of " incident ray ", " reflection ray ", " refracted ray " links together, and couple together by the adjusting handle of four connecting rods with three bonding jumpers and the back side, on mainboard, be carved with one perpendicular one horizontal two gathering sills, adjusting handle can only move along gathering sill, three bonding jumpers that light is represented in pulling during adjusting handle with regard to analog demenstration reflection of light law, refraction law.