When a Clean Surface of Potassium Metal Is Exposed to Blue

question 34

Multiple Choice

When a clean surface of potassium metal is exposed to blue light, electrons are emitted. If the intensity of the blue light is increased, which of the following will also increase?

• A) the number of electrons ejected per second
• B) the threshold frequency of the ejected electrons
• C) the maximum kinetic energy of the ejected electrons
• D) the time lag between the absorption of blue light and the start of emission of the electrons
• E) none of these

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Definitions:

Sphenoid

A butterfly-shaped bone at the base of the skull, behind the eyes, touching on various important structures and enclosing the pituitary gland.

Maxilla

the upper jawbone in vertebrates, which is key to the formation of the palate, nose, and eye orbits.

Lumbar Curvature

The inward curve of the lumbar spine (lower back), which is a natural part of the spine's shape.

Sacral Curvature

The natural inward curvature (lordosis) of the sacral spine region that contributes to the overall S-shape of the spinal column.