BuyFindarrow_forward

University Physics Volume 3

17th Edition
William Moebs + 1 other
ISBN: 9781938168185
BuyFindarrow_forward

University Physics Volume 3

17th Edition
William Moebs + 1 other
ISBN: 9781938168185
Textbook Problem

Distances to local galaxies are determined by measuring the brightness of stars, called Cepheid variables, that can be observed individually and that have absolute brightnesses at a standard distance that are well known. Explain how the measured brightness would vary with distance, as compared with the absolute brightness.

To determine

How the measured brightness would vary with distance, as compared to absolute brightness.

Explanation

Introduction:

Measuring the brightness of star from the distance of 32.6yrs or 10 parsecs from Earth is called absolute brightness whereas the measured brightness is that how bright that stars appear from Earth.

The measured brightness m and the absolute brightness M are related by the formula

  mM=5log(D/10)where, D is the distance from the star

The absolute brightness is a constant and is 10 parsecs from Earth

The measured brightness depends on the distance from the star.

So both the thing have a minute difference, so understand we could use a relevant formula having both the factors involved in it which will act as a relation

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Science Solutions

Find more solutions based on key concepts

Show solutions add

(a) What is the angular speed of the second hand of an analog clock? (b) What is the direction of as you view ...

Physics for Scientists and Engineers, Technology Update (No access codes included)

The end product of cleavage is a __________. a. gamete b. blastula c. gastrula d. zygote

Biology: The Unity and Diversity of Life (MindTap Course List)

How can errors in the cell cycle lead to cancer in humans?

Human Heredity: Principles and Issues (MindTap Course List)

By law, food labels must name the ingredients in descending order of predominance by weight and in ordinary lan...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

Is the speed of sound the same at all ocean depths?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin

How do eating disorders affect health?

Understanding Nutrition (MindTap Course List)