A Light Beam Is Shining on a Metal Target That

question 93

Multiple Choice

A light beam is shining on a metal target that has a work function of 1.8 eV.If a stopping potential of 0.7 V is required,what is the wavelength of the incoming monochromatic light? (h = 6.63 × 10−³⁴ J⋅s,c = 3.00 × 10⁸ m/s,1 eV = 1.60 × 10−¹⁹ J,and 1 nm = 10−⁹ m)

• A)497 nm
• B)166 nm
• C)796 nm
• D)1130 nm
• E)​691 nm

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Definitions:

Flooding

A psychological treatment method that exposes the patient to their feared objects or situations extensively and intensively.

Phobias

Irrational and overwhelming fears of objects, creatures, or situations, often leading to avoidance behavior.

Paradoxical Intent

A cognitive therapy technique in which an individual deliberately practices or exaggerates a feared behavior or thought in order to diminish its power.

Aversive Therapy

A form of behavioral therapy that involves using unpleasant stimuli to reduce or eliminate undesirable behavior.