If the Work Function of a Metal Surface Is 2

question 18

Multiple Choice

If the work function of a metal surface is 2.20 eV,what frequency of incident light would give a maximum kinetic energy of 0.25 eV to the photoelectrons ejected from this surface? (1 eV = 1.60 × 10^-19 J,h = 6.626 × 10^-34 J ∙ s)

• A)2.05 × 10¹⁴ Hz
• B)1.02 × 10¹⁴ Hz
• C)2.50 × 10¹⁴ Hz
• D)3.53 × 10¹⁴ Hz
• E)5.92 × 10¹⁴ Hz

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Definitions:

Dependent Personality Disorder

A mental health condition characterized by an overwhelming dependence on others to meet emotional and physical needs, often leading to difficulties in everyday functioning.

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Cognitive-Behavioral Therapy

A psychotherapeutic treatment that aims to change patterns of thinking or behavior that contribute to people's difficulties, thereby changing the way they feel.

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