Transverse & Longitudinal Waves

Q.

How is the direction of propagation of medium particles related to the direction of propagation of a longitudinal wave?

Q.

Can De Broglie waves travel in vacuum?

Q. Assertion: Longitudinal waves are called pressure waves.
Reason: Propagation of longitudinal waves through a medium involves changes in pressure in the medium.

1. Both assertion and reason are correct and reason is the correct explanation of assertion.
2. Both assertion and reason are correct but reason is not a correct explanation of assertion.
3. Assertion is correct but reason is incorrect.
4. Assertion is incorrect but reason is correct.

Q. In a longitudinal wave, the motion of a particle is perpendicular to the direction of propagation of wave.

1. False
2. True

Q. Assertion: Transverse mechanical wave does not travel in air.
Reason: Air has only bulk modulus of elasticity.

1. Both assertion and reason are correct and reason is the correct explanation of assertion.
2. Both assertion and reason are correct but reason is not a correct explanation of assertion
3. Assertion is correct but reason is incorrect
4. Assertion is incorrect but reason is correct

Q. Assertion: Transverse mechanical wave does not travel in air.
Reason: Air has only bulk modulus of elasticity.

1. Both assertion and reason are correct and reason is the correct explanation of assertion.
2. Both assertion and reason are correct but reason is not a correct explanation of assertion
3. Assertion is correct but reason is incorrect
4. Assertion is incorrect but reason is correct

Q.

Which quantity is transmitted with the propagation of longitudinal waves through a medium?

Q. The work function $(\varphi$) of some metals is listed below.
$[\text{Use}hc=1240\text{eV nm}]$

Metal	Work function $\left(\varphi \right)$ $\left(\text{eV}\right)$
$\text{Li}$	$2.4$
$\text{Cu}$	$4.8$
$\text{Ag}$	$4.3$
$\text{W}$	$4.75$

The metal(s) that shows photoelectric emission when illuminated by light of wavelength $300\text{nm}$.

1. $\text{W}$
2. $\text{Li}$
3. $\text{Ag}$
4. $\text{Cu}$

Q. A mechanical wave propagates in a medium along the X-axis. The particles of the medium

1. must move on the X-axis
2. must move on the Y-axis
3. may move on the X-axis
4. may move on the Y-axis

Q. When a longitudinal wave propagates through a medium, the particles of the medium execute simple harmonic oscillations about their mean positions. which of the following quantity remains invariant in these oscillations of the particle ?

1. Kinetic energy
2. Potential energy
3. Sum of kinetic energy and potential energy
4. Difference between kinetic energy and potential energy

Q. In a longitudinal wave:

1. The motion of a particle is perpendicular to the direction of propagation of wave
2. The motion of a particle is at an agle to the direction of propagation of wave
3. The motion of a particle is along the direction of propagation of wave
4. Can't comment