video de la explicación de esta pregunta de ciencias del icfes ---Question Stem: 92. Cuatro jóvenes se encuentran estudiando el perfil de tres ondas electromagnéticas (onda X, Y y Z) que se propagan en un mismo medio, graficados todos a una misma escala, tal como se representa en la siguiente figura: Chart Description: The image contains three separate line charts plotted vertically. Each chart represents the profile of an electromagnetic wave as a function of time. - **Type:** Line charts representing waves. - **Axes:** - Horizontal Axis: Labeled 't(s)', representing time in seconds. Scale is marked from 0 to 5 with tick marks at integer values (0, 1, 2, 3, 4, 5). - Vertical Axis: Represents the wave displacement/amplitude. No numerical scale or unit is provided. The zero line is indicated by the horizontal axis. - **Plots:** - **Onda X:** Shows a wave starting at 0, rising to a peak, falling through 0 to a trough, and rising back to 0. This completes one cycle. Visually, there are 5 complete cycles depicted in the time interval from 0 to 5 seconds. - **Onda Y:** Shows a wave starting at 0, rising to a peak, falling through 0 to a trough, and rising back to 0 at t=5s. This depicts one complete cycle in the time interval from 0 to 5 seconds. - **Onda Z:** Shows a wave starting at 0, rising to a peak, falling through 0 to a trough, rising back through 0 to a peak, and falling through 0 at t=5s. This depicts two complete cycles in the time interval from 0 to 5 seconds. Question: Considerando el análisis de los perfiles de las ondas X, Y y Z, ¿cuál de las siguientes conclusiones es correcta? Options: A. El periodo de las ondas X, Y y Z es el mismo. B. La longitud de onda de las ondas X, Y y Z es la misma. C. La velocidad de la onda Y es mayor que la velocidad de la onda Z. D. La frecuencia de la onda X es mayor que la frecuencia de la onda Z. Analysis based on charts: - Onda X: 5 cycles in 5 seconds. Period T_X = 5s / 5 cycles = 1s. Frequency f_X = 1/T_X = 1 Hz. - Onda Y: 1 cycle in 5 seconds. Period T_Y = 5s / 1 cycle = 5s. Frequency f_Y = 1/T_Y = 0.2 Hz. - Onda Z: 2 cycles in 5 seconds. Period T_Z = 5s / 2 cycles = 2.5s. Frequency f_Z = 1/T_Z = 0.4 Hz. Conclusion Check: A. Periods are 1s, 5s, 2.5s. Not the same. B. Waves propagate in the same medium, so their speed (v) is the same. Wavelength λ = v/f. Since frequencies are different, wavelengths must be different. Not the same. C. Waves in the same medium have the same speed. Speed of Y is the same as speed of Z. Not greater. D. Frequency of X is 1 Hz, frequency of Z is 0.4 Hz. 1 Hz > 0.4 Hz. Frequency of X is greater than frequency of Z. Correct.