In Observations of a Double-Quasar Image Produced by Gravitational Lensing,fluctuations

question 85

Multiple Choice

In observations of a double-quasar image produced by gravitational lensing,fluctuations on the intensity of one image appear to be delayed compared to equivalent variations on the other image.Why is this?

• A) Rotation of the lensing galaxy has delayed the beam of light on one side compared to the other because of the Doppler effect.
• B) One beam has had to pass through material with a greater refractive index than the other beam within the lensing galaxy.
• C) The gravitational field of the lensing object slows down the light on one beam compared to the other.
• D) The optical path through the gravitational lens producing one image is longer than that for the other image.

Analyze equilibrium conditions in the aggregate demand and aggregate supply model.

Understand the concept of market risk, including how beta measures the sensitivity of a stock's returns to market movements.

Comprehend the benefits of diversification in reducing investment risk.

Differentiate between diversifiable and non-diversifiable (systematic) risk.

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Environmental Problems

Issues relating to damage of the natural environment due to human activity, including pollution, climate change, and loss of biodiversity.

Technological Forces

External factors in the environment that relate to technological advancements and innovations, impacting businesses and society.

Environmental Racism

The practice of disproportionately exposing communities of color and low-income groups to environmental hazards and pollution.

African-American Communities

Social, cultural, and geographical groupings of African-American individuals characterized by unique historical, economic, and social experiences.