RT Journal Article
T1 Hands-on visualization of the effect of fictitious forces with a laser pointer
A1 Vázquez Dorrío, José Benito
A1 Paredes Galán, Ángel
A1 Angel Queiruga-Dios, Miguel
K1 2299 Otras Especialidades Físicas
K1 5899 Otras Especialidades Pedagógicas
K1 2205 Mecánica
AB Abstract            Inertial motion looks like accelerated motion when observed from the point of view of a non-inertial reference frame. A non-inertial observer can then describe the trajectories by introducing fictitious forces, like the centrifugal and Coriolis forces, that arise from the coordinate change between reference frames. This well-known fact is part of the typical Physics syllabus for undergraduate scientists and engineers, and a number of interesting classroom demonstrations have been discussed in the literature. We present a complementary possibility for the visualization of the effect of fictitious forces by shining a blue laser beam on a rotating platform covered with a phosphorescent vinyl sheet. The laser can be moved in order to simulate inertial motion in the laboratory frame for the trajectory of the laser spot. This gets immediately imprinted in the rotating phosphorescent material resulting in non-inertial trajectories that can be readily observed and compared to the dynamics governed by fictitious forces. Since friction is not considered, this hands-on activity can be considered as a direct demonstration of the effect of pure fictitious forces in and out of the classroom. The approach is simple, inexpensive, fast and non-destructive, and can therefore be very convenient for active lecture demonstrations or individual activities of students. We also describe some educational possibilities of how to use the procedure in the classroom or in the laboratory.
PB European Journal of Physics
SN 01430807
YR 2024
FD 2024-01
LK http://hdl.handle.net/11093/7160
UL http://hdl.handle.net/11093/7160
LA eng
NO European Journal of Physics, 45(1): 015001 (2023)
NO Agencia Estatal de Investigación | Ref. PID2020-118613GB-I00
DS Investigo
RD 04-dic-2024