A Perfectly Black Sphere 18

question 24

Short Answer

A perfectly black sphere 18.0 cm in diameter is held at a temperature of 215°C. (σ = 5.670 × 10-8 W/m² ∙ K⁴, Wien displacement law constant is 2.90 × 10^-3 m ∙ K, h = 6.626 × 10^-34 J ∙ s, c = 3.00 × 10⁸ m/s)
(a) Near what wavelength does this sphere radiate most strongly?
(b) If all the radiated energy were at the wavelength found in part (a), how many photons would the sphere emit each second?

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Definitions:

Romantic Relationship

A bond between two people characterized by emotional and usually sexual affection.

Reproductive Potential

The biological capability to reproduce, involving factors like the viability of gametes, fertility, and general health influencing the success of reproduction.

Good Health

A state of complete physical, mental, and social well-being, not merely the absence of disease or infirmity.

Sexual Strategies Theory

The theory that men and women have different short-term and long-term mating strategies.