A Red Laser Emits a Pulse of Light Every 10

question 23

Short Answer

A red laser emits a pulse of light every 10 s.If the laser operates at a wavelength of 695 nm and 50 W,calculate the number of photons emitted during a pulse.(1 W = 1 J/s)

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Definitions:

Activity Theory

A theoretical framework that examines how human actions are mediated by tools and symbols, emphasizing the context of social and cultural development.

Disengagement Theory

A theory that suggests aging individuals gradually withdraw from social and societal roles and responsibilities, leading to increased self-reflection and decreased social interaction.

Late Adulthood

A stage of human development that typically refers to individuals aged 65 and older, often characterized by retirement, life review, and increased focus on health.

Ego Integrity Versus Despair

Erikson’s eighth life crisis, defined by maintenance of the belief that life is meaningful and worthwhile despite physical decline and the inevitability of death versus depression and hopelessness.