Electron Math

Electron Math

Multiple Choice

What is the speed of light in a vacuum?

• $$3\times10^8$$ m/s

• $$3\times10^{-8}$$ m/s

• $$6.63\times10^{34}$$ J s

• $$6.63\times10^{-34}$$ J s

Multiple Choice

What is the frequency of red light that has a wavelength of $$7.5\ \times10^{-7}$$  m?

• $$4\times10^{-14}$$ Hz

• $$4\times10^{14}$$ Hz

• $$2.5\times10^{14}$$ Hz

• $$2.5\times10^{-14}$$ HZ

Multiple Choice

What is the value of Planck's constant?

• $$3\times10^8$$ m/s

• $$3\times10^{-8}$$ m/s

• $$6.63\times10^{34}$$ J s

• $$6.63\times10^{-34}$$ J s

Multiple Choice

The equation that shows the relationship between the energy of light and frequency is: 

• c= λ⋅f
• E=h⋅f

Multiple Choice

What is the frequency of UV light that has an energy of 2.39 × 10 ^-18 J? 

• 2.32 x 10⁹ Hz
• 3.60 x 10¹⁵ Hz
• 1.58 x 10^-51 Hz
• 3 x 10⁸  m/s

Multiple Choice

Find the energy, in joules per photon, of microwave radiation with a frequency of 7.91 × 10 ¹⁰ 1/s.

• 6.63 x 10^-34 J
• 5.25 x 10¹⁴ J
• 5.24 x 10^-23 J
• 1.19 x 10⁴⁴ J