The Spectrum of a Galaxy Is Observed to Have a Hydrogen

question 42

Essay

The spectrum of a galaxy is observed to have a hydrogen emission line,normally found at 656.3 nm,with a measured wavelength of 856.3 nm.What is its distance if the Hubble constant is 22 km/s/Mly?

---

Definitions:

Research Objectives

The specific, concise goals or questions that a study aims to address or answer.

Problem Definition

The process of identifying and outlining the specifics of a problem or challenge to be solved.

Neuromarketers

Marketing professionals who utilize neuroscience and psychological principles to better understand consumer behavior, preferences, and engagement strategies.

Observation Research

A data-collection tool that involves watching how people behave and recording anything about that behavior that might be relevant to the research objective.