Diffraction Grating: a He-Ne Laser, Which Produces Light of Wavelength

question 20

Multiple Choice

Diffraction grating: A He-Ne laser, which produces light of wavelength 632.8 nm, is used to calibrate a diffraction grating. If the first-order maximum occurs at 20.5° from the central spot, what is the distance between the slits of the grating?

• A) 0.905 µm
• B) 1.81 µm
• C) 2.20 µm
• D) 3.62 µm
• E) 4.52 µm

Compare and contrast the viewpoints of Malthus and Marx on overpopulation, understanding their historical and theoretical contexts.

Understand the role and methods of demographers in studying populations.

Describe the concept of the Malthusian trap and its relevance to population studies.

Analyze urban development and life styles in different types of cities and the socio-economic phenomena such as gentrification and suburbanism.

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Definitions:

Northern Investors

Businesspersons or companies from the northern United States who invested capital, especially in the development of the southern states and various industries.

Plessy V. Ferguson

A landmark 1896 U.S. Supreme Court decision that upheld the constitutionality of racial segregation under the "separate but equal" doctrine.

Segregated Facilities

Public or private establishments that were separated based on race or ethnicity, typified by signs designating usage by either 'whites' or 'colored' during periods of legal segregation.

Fourteenth Amendment

An amendment to the United States Constitution, granting citizenship to all persons born or naturalized in the U.S., including former slaves, and providing all citizens with equal protection under the laws.