How Far Away Can Two Point Sources of Wavelength 500

question 45

Multiple Choice

How far away can two point sources of wavelength 500 nm be if they are just resolved in a telescope of aperture 1.5 cm?

• A) 25 km
• B) 12 km
• C) 90 m
• D) 12 m
• E) more information is needed

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Definitions:

Substitution Bias

Substitution bias occurs in inflation measurement and refers to the tendency of consumers to change their purchasing habits away from goods that have increased in price to cheaper alternatives, which is not always fully captured by price indexes.

CPI

The Consumer Price Index, which measures the average change over time in the prices paid by urban consumers for a market basket of consumer goods and services.

Consumer Substitution

The tendency of consumers to switch from one good to another in response to changes in relative prices, keeping their level of satisfaction or utility constant.

New Good

A product that has been recently developed or introduced to the market, offering new benefits or replacing existing goods.