There are two boxes A & B. Cell phones are kept in both the boxes, all air is sucked from box A and then closed by a device. While box B is simply closed by a device without sucking air from it. A call is made simultaneously from both the phones, but sound comes only from box B. This is because:
Statement 1: In box A, there are air particles to vibrate and box B is a vacuum.
Statement 2: Sound needs a medium for propagation.
There are two boxes A & B. Cell phones are kept in both the boxes, all air is sucked from box A and then closed by a device. While box B is simply closed by a device without sucking air from it. A call is made simultaneously from both the phones, but sound comes only from box B. This is because:
Statement 1: In box A, there are air particles to vibrate and box B is a vacuum.
Statement 2: Sound needs a medium for propagation.
The correct option is D Statement 1 is false but statement 2 is true
A mechanical wave is a wave that is not capable of transmitting its energy through a vacuum. Mechanical waves require a medium in order to transport their energy from one location to another. A sound wave is an example of a mechanical wave. Sound waves are incapable of traveling through a vacuum.
In box A, there are no air particles to vibrate, so sound does not propagate in box A and no sound is heard. But in box B there are air particles to vibrate and hence sound propagates.
Statement 1 is false but statement 2 is true
A mechanical wave is a wave that is not capable of transmitting its energy through a vacuum. Mechanical waves require a medium in order to transport their energy from one location to another. A sound wave is an example of a mechanical wave. Sound waves are incapable of traveling through a vacuum.
In box A, there are no air particles to vibrate, so sound does not propagate in box A and no sound is heard. But in box B there are air particles to vibrate and hence sound propagates.
