Fiber-optic devices transmit beams of light down thin, transparent filaments. Which of the following best describes the wave behavior that keeps the beam confined to the filament? a. The beam is reflected back and forth across the filament.
b. The beam is inducted by the filament.
c. The beam is refracted by the curvature of the filament.
d. The beam is diffracted by the curvature of the filament.

What precautions should you take to prevent injuries when dealing with heavy loads?

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?