Subtitles section Play video Print subtitles Smart Learning for All Topic: Speed of sound. Why does sound travel faster in summer than in winter? Wow. That was an amazing trick. The television switched on immediately after you clapped. I know. This is one of my favorite tricks. Now, I bet you that the television will not switch on instantly after your clap. This time I am going to prove you wrong. See. I told you. I lost again. Do you know why the sound took more time to reach the television? This is because the speed of sound decreased. Speed of sound depends on the temperature of the medium. Higher the temperature of the medium, more will be the speed of sound and vice versa. So, in this case, what do you think is the medium? Are you kidding me? I don't know. No Problem. I will tell you. In this case, air is the medium. During summer season, the temperature of air increases. At higher temperature, the molecules of air have more kinetic energy. Hence, they vibrate faster leading to increase in speed of sound. Now, during winter season, the temperature of air decreases. With the decrease in temperature, the kinetic energy of the molecules also decreases. Hence, the molecules do not vibrate much. As a result, the speed of sound decreases during winter season. For more educational videos please visit http://www.SmartLearningforAll.com Also, don't forget to subscribe to our YouTube channel.