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3 years ago

Which type of wave can travel without a medium

Physics

2 answers:

Norma-Jean [14]3 years ago

7 0

Electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.

fredd [130]3 years ago

6 0

Electromagnetic waves can travel without a medium.

Explanation:

The main property of the waves is the way how they propagate or travel in medium. The waves which can travel without a medium is said to travel in vacuum or air.

Hence electromagnetic waves are capable of travelling with and without medium whereas mechanical waves always requires a medium for it to propagate. There are a wide range of electromagnetic waves depending upon their wavelength.

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13. Describe the molecules of a solid in terms of kinetic energy.

Y_Kistochka [10]

The kinetic molecular theory of matter states that: ... Molecules in the solid phase have the least amount of energy, while gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles.

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2 years ago

X rays of wavelength 0.0169 nm are directed in the positive direction of an x axis onto a target containing loosely bound electr

mamaluj [8]

Answer:

a) 4.04*10^-12m

b) 0.0209nm

c) 0.253MeV

Explanation:

The formula for Compton's scattering is given by:

$\Delta \lambda=\lambda_f-\lambda_i=\frac{h}{m_oc}(1-cos\theta)$

where h is the Planck's constant, m is the mass of the electron and c is the speed of light.

a) by replacing in the formula you obtain the Compton shift:

$\Delta \lambda=\frac{6.62*10^{-34}Js}{(9.1*10^{-31}kg)(3*10^8m/s)}(1-cos132\°)=4.04*10^{-12}m$

b) The change in photon energy is given by:

$\Delta E=E_f-E_i=h\frac{c}{\lambda_f}-h\frac{c}{\lambda_i}=hc(\frac{1}{\lambda_f}-\frac{1}{\lambda_i})\\\\\lambda_f=4.04*10^{-12}m +\lambda_i=4.04*10^{-12}m+(0.0169*10^{-9}m)=2.09*10^{-11}m=0.0209nm$

c) The electron Compton wavelength is 2.43 × 10-12 m. Hence you can use the Broglie's relation to compute the momentum of the electron and then the kinetic energy.

$P=\frac{h}{\lambda_e}=\frac{6.62*10^{-34}Js}{2.43*10^{-12}m}=2.72*10^{-22}kgm\\$

$E_e=\frac{p^2}{2m_e}=\frac{(2.72*10^{-22}kgm)^2}{2(9.1*10^{-31}kg)}=4.06*10^{-14}J\\\\1J=6.242*10^{18}eV\\\\E_e=4.06*10^{-14}(6.242*10^{18}eV)=0.253MeV$

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3 years ago

Radioactive was discovered by Albert Einstein Truth or False Need answer

Iteru [2.4K]

False .......................

4 0

3 years ago

Read 2 more answers

The electric force between two charged balloons is 0.12 newtons. If the distance between the two balloons is halved, what will b

marshall27 [118]

Answer:

The answer is D, I just took the test

Explanation:

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3 years ago

Why does sugar dissolves easily in water but sand doesn’t

GarryVolchara [31]

Table sugar dissolves in water because when a sucrose molecule breaks from the sugar crystal, it is immediately surrounded by water molecules. The sucrose has hydroxyl groups that have a slight negative charge. ... Sand can't dissolve in waterbecause the 'spaces' in between the water particles. :)

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3 years ago