Resonance experiment instrument for laser pointer light source
The tuning fork resonance experimental instrument with a laser pointer as the light source solves the problems that the experimental phenomenon is not obvious and the students are not easy to observe. Solution: Including Laser pointer, light screen, beam splitter, reflector, tuning fork with reflector, resonance box, and bottom plate; tuning fork with reflector is installed on the resonance box; they are installed on the bottom plate according to the relationship between the transmission and reflection of the beam Top: The laser pointer is installed on the right side, the beam is first irradiated on the reflector (9), and then reflected to the reflector (7), and then reflected to the beam splitter (11); the light is reflected by the beam splitter (11) The transmitted light hits the light screen (3), and the transmitted light reaches the light splitting plate (12); the transmitted light hits the light screen (2), and the reflected light is reflected by the reflector (10) and then onto the light splitting plate (13) ; The reflected light hits the light screen (3) again, and the transmitted light hits the reflector (8), and is reflected on the light screen (2) by the reflector (8). It has a simple structure and low cost, and can be easily brought into the classroom, so that all students can observe the experiment with obvious effect, vividness and vividness.
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In the middle school physics teaching of sound propagation and sound resonance in the medium, tuning forks are generally used for demonstration. When teaching sound propagation, it is demonstrated through the vibration of the tuning fork. Usually, the grass ball or foam plastic ball is light and easy to float. When it touches the tuning fork, the small ball bounces, indicating that the tuning fork is vibrating, that is, the sound is propagating in the medium. However, when demonstrating the experiment, there are actually the following problems: First, the small ball is easily affected by air flow (air resistance); second, the surface of the grass ball is relatively soft, and "soft collision" occurs when it touches the tuning fork. , Will also affect the bounce effect, so the bounce amplitude of the small ball is not large, very small, and it is not easy to be observed by the students.
2021-10-12 11:30:20
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