A Photocathode Whose Work Function Is 2

question 67

Multiple Choice

A photocathode whose work function is 2.9 eV is illuminated with white light that has a continuous wavelength band from 400 nm to 700 nm.What is the range of the wavelength band in this white light illumination for which photoelectrons are not produced? (c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s,1 eV = 1.60 × 10^-19 J)

• A)430 nm to 700 nm
• B)400 nm to 480 nm
• C)430 nm to 480 nm
• D)400 nm to 430 nm
• E)480 nm to 700 nm

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Definitions:

Internalized Homophobia

The involuntary belief, adoption, and application of homophobic attitudes towards oneself.

LGBT Population

Individuals who identify as lesbian, gay, bisexual, or transgender, often examined in research and social policy for their unique health and sociocultural experiences.

Non-Heterosexual Behaviors

Actions or expressions of sexuality that do not conform to heterosexual norms, encompassing a spectrum of sexual orientations and identities.

Gay Affirmative Therapy

A therapeutic approach that recognizes and supports the sexual orientation of LGBTQ individuals in a positive manner, counteracting societal stigma and discrimination.