PHOTOELECTRIC EFFECT

Photoelectric effect provides the evidence for the ______ nature of radiation.

• wave

• dual

• electromagnetic

• particle

Light of a given wavelength is used to illuminate the surface of a metal. However, no photoelectrons are emitted. In order to cause electrons to be ejected, light of __________ should be used.

• higher intensity

• shorter frequency

• lower energy

• higher frequency

Use the graph to find the threshold frequency.

• 2×10¹⁵ Hz

• 4×10¹⁵ Hz

• 0 Hz

• −12×10^-19 Hz

The energy of photoelectrons emitted from a metal surface can be increased by ________.

• using light of higher intensity

• using light of higher frequency

• using light of longer wavelength

• using monochromatic, polarized light

This image is an illustration of_______.

• Bohr model

• quantum mechanical model

• photoelectric effect

• Dalton's atomic theory

Give the equation of threshold frequency. 

• 4.6x10^-19 J

• 3.3x10^-19 J

• 5.0x10^-19 J

• 2.5x10^-19 J

• 1.02×10¹⁵ Hz

• 5.75×10¹⁵ Hz

• 3.06×10¹⁵ Hz

• 8.02×10¹⁵ Hz

• 765 nm

• 7.65×10^-26 m

• 552 nm

• 5.52×10^-26 m

• 1.09 eV

• 6.54 eV

• 8.72 eV

• 2.18 eV