MATTER WAVES

What is the formula for De Broglie's wavelength

• wavelength = planck's constant/(mass*velocity)

• wavelength = planck's constant/(momentum/velocity)

• wavelength = planck's constant*(momentum*velocity)

• E = hf

What is the evidence for constructive interference?

• Bright and dark fringes in Diffraction

• Bright fringes in reflection

• Total internal reflection

When electrons are accelerated in a (..........) and are passed through a screen, diffraction patterns can be observed.

What was the experimental outcome of Davisson-Germer's experiment?

• 165 m

• 167 nm

• 165 nm

• 167 m

What is diffraction?

• Diffraction is the spreading of waves around obstacles.

• Diffraction takes place with sound and with electromagnetic radiation, such as light, X-rays, and gamma rays.

• Diffraction takes place with electrons, which show wavelike properties.

• Diffraction is a hoax

Bonus Question: Who is the oldest member of 2020-2021 Year 13 Physics BST/STE?

• Jakub

• Salman

• Brennan

• Ana

• None of the above

A transverse wave is ...

• A wave that oscillates perpendicular to the direction of movement

• A wave that oscillates parallel to the direction of movement

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Why could De Broglie sub 'v' in for 'c'

• Real particles do not travel at the speed of light

• Real particles have less mass than non-real particles

• The Davisson Germer experiment explains this

• It made deriving the formula easier

Where is the CERN particle accelerator?

• Germany

• Luxembourg

• France

• Switzerland

• Ukraine