ความเป็นคู่ของคลื่น-อนุภาค

The wave-particle duality of light describes light as...

• a wave only
• a particle only
• both a wave and a particle
• neither a wave nor a particle

Tags

NGSS.HS-PS4-3

Only the wave theory of light offers an explanation for the ability of light to exhibit...

• diffraction.
• reflection.
• photoluminescence.
• illumination.

1 eV is equal to

• 1.6 × 10^-19 J
• 2.0 × 10^-20 J
• 3 J
• 4 J

A particle of mass m has a kinetic energy of E.

What is the de Broglie wavelength of this particle?

• A

• B

• C

• D

Tags

NGSS.HS-PS4-1

Experiments on which of the following suggested the wave nature of electrons?

• electron diffraction by a crystalline material

• β⁻ decay

• line spectra of atoms

• the photoelectric effect

Tags

NGSS.HS-PS4-3

An electron has a kinetic energy E and a de Broglie wavelength λ. The kinetic energy is increased to 4E. What is the new de Broglie wavelength?

• λ/4

• λ/2

• λ

• 4λ

Tags

NGSS.HS-PS3-2

NGSS.HS-PS4-1

The relationship between wavelength and frequency is λ=c/f.  Calculate the wavelength of light that has a frequency of 5.2 x 10¹² 1/s. The speed of of light is 3.0x 10⁸ m/s.

• 5.8 x 10 ^-5 m
• 5.8 x 10 ^-7 m
• 5.19 x 10 ¹⁴ m
• 1.56 x 10 ²³ m

Tags

NGSS.HS-PS4-1

Solve this problems using the equation:

C = λf

If an AM radio station broadcasts at

9.95 x 10⁵ Hz, what is the wavelength of this radiation?

• 6.59 x 10^-28 m

• 1.01 x 10^-6 m

• 3.32 x 10^-3 m

• 302 m

The distance between two crests or two troughs of a wave is called:

• frequency
• amplitud
• wavelength
• hertz

Which wave has a greater frequency?

• A
• B

Tags

NGSS.HS-PS4-1