In a Photoelectric Experiment,the Threshold Frequency for a Material Is $\times$

question 73

Multiple Choice

In a photoelectric experiment,the threshold frequency for a material is 3.2 $\times$ 10¹⁴ Hz.An electron ejected from this surface by a photon of frequency 9.4 $\times$ 10¹⁴ Hz can be stopped by a stopping potential of

• A)8.5 mV
• B)1.6 V
• C)0.26 nV
• D)2.6 V
• E)3.6 kV

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Definitions:

Radiometric Dating

A method for determining the age of an object based on the decay rate of radioactive isotopes contained within it.

Half-Life

The time required for half the quantity of a radioactive substance to undergo decay or for a drug's concentration in the body to be reduced by half.

Isotope

Variants of a particular chemical element that differ in neutron number, and therefore in mass, but share the same chemical properties.

Atoms Decay

A natural process by which the nucleus of an unstable atom loses energy by emitting radiation, leading to the transformation of the atom into a different element or isotope.