Apparent brightness Study guides, Class notes & Summaries
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CT Registry Review (MIC) Questions and Answers Rated 100%
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CT Registry Review (MIC) Questions and Answers Rated 100% 
 
In order for an x-ray photon to be measured it must: 
1. enter the detector chamber 
2. be absorbed by the detector material 
3. be converted to a measurable event *ANS* 1,2,3 
 
Which system component converts the projection attenuation data into the proper digital form for the array processor? *ANS* analog-to-digital converter 
 
Which of the following is NOT a function of a PACS system? 
a. reconstruction of the image from the raw d...
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ASTR 102 Midterm 2 | 100% Correct Answers | Verified | Latest 2024 Version
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A star has an apparent brightness of -2 and an absolute brightness of 1. What must be true? 
Select one: 
a. The star is further than 10 parsecs 
b. The star is at 10 parsecs 
c. The star is closer than 10 parsecs 
d. The star is close to exploding - c 
What is special about electromagnetic waves? 
Select one: 
a. We can see all of them 
b. They do not need a medium to travel 
c. They only exist near stars 
d. Each color travels at a different speed - b 
A star that has a smaller absolute bright...
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Big Bang Theory Hubble s Law Performance Assessment
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Name:	Date: 
 
 
STUDENT EXPLORATION: BIG BANG THEORY – HUBBLE’S LAW 
DIRECTIONS: FOLLOW THE INSTRUCTIONS TO GO THROUGH THE SIMULATION. RESPOND TO THE QUESTIONS AND PROMPTS IN THE ORANGE BOXES. 
Vocabulary: absolute brightness, absorption spectrum, apparent brightness, Big Bang theory, blueshift, Cepheid variable, Doppler shift, Hubble constant, Hubble’s law, luminosity, megaparsec, period, redshift, spectrograph 
Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 
Standing by th...
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Student Exploration: Big Bang Theory – Hubble’s Law ALL ANSWERS 100% CORRECT FALL-2021 SOLUTION GUARANTEED GRADE A+
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Vocabulary: absolute brightness, absorption spectrum, apparent brightness, Big Bang theory, blueshift, Cepheid variable, Doppler shift, Hubble constant, Hubble’s law, luminosity, megaparsec, period, redshift, spectrograph 
 
Gizmo Warm-up 
In 1912, an astronomer named Henrietta Swan Leavitt studied a class of stars called Cepheid variables. 
These stars change from bright to dim to bright again. 
Her discoveries led to a method of measuring distances to other galaxies and eventually helped to ...
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Gizmos Student Exploration: Big Bang Theory – Hubble’s Law
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Gizmos Student Exploration: Big Bang Theory – Hubble’s Law 
 
 
Vocabulary: absolute brightness, absorption spectrum, apparent brightness, Big Bang theory, blueshift, Cepheid variable, Doppler shift, Hubble constant, Hubble’s law, luminosity, megaparsec, period, redshift, spectrograph 
 
 
Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 
Standing by the side of a lonely highway at night, you see two motorcycle headlights, one in each direction. The headlight on your left appea...
And that's how you make extra money
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GIZMOS Student Exploration: Big Bang Theory – Hubble’s Law 2023
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GIZMOS Student Exploration: Big Bang Theory – Hubble’s Law 2023. Collect data: Locate and select the yellow Cepheid variable star (A-091) in the lower left 
section of the Andromeda Galaxy. Click the Collect data button. You will see a graph of the 
apparent brightness of the star over time. 
A. How does the star’s apparent brightness change over time? It decreases, then increases, and 
decreases again. Its like a pattern. 
B. Turn on Show time probes. Set the left probe at the first brigh...
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LAB 4 ASTR 102
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Lab 4 
How Big is our Galaxy? 
ASTRO 102 
1 Objective 
The objective of this lab was to introduce methods that astronomers use to estimate properties of 
astronomical objects using observations. 
2 Introduction 
A variable star is a star whose brightness changes periodically. Variable stars are comprised of two 
categories, intrinsic and extrinsic variables. The luminosity of an intrinsic star changes, whereas only the 
apparent brightness of an extrinsic star changes due to changes in the amoun...
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Space Exploration|Complete Questions with A+ Graded Answers
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Space Exploration|Complete Questions with A+ Graded Answers 
main sequence 
a diagonal area on an H-R diagram that includes more than 90 percent of all stars 
 
 
white dwarf 
A small, hot, dim star that is the leftover center of an old star 
 
 
Luminosity 
the true brightness of an object 
 
 
light year 
the distance light travels in one year 
 
 
blueshifted 
the doppler shift toward shorter wavelengths of light from an approaching object 
 
 
Redshifted 
stars moving away from Earth 
 
 
Ne...
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GIZMOS Student Exploration; Big Bang Theory | Hubble’s Law 2023
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GIZMOS Student Exploration; Big Bang Theory | Hubble’s Law 2023. Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 
Standing by the side of a lonely highway at night, you see two motorcycle headlights, one in 
each direction. The headlight on your left appears brighter than the one on your right. 
1. If the headlights are equally bright, which motorcycle is closer? The one on the left side 
Explain: If it is brighter than that means its going to be closer because the light particle...
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GIZMOS STUDENT EXPLORATION: BIG BANG THEORY – HUBBLE’S LAW 2021 THE BEST EXAM
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GIZMOS STUDENT EXPLORATION: BIG BANG THEORY – 
HUBBLE’S LAW 
2021 THE BEST EXAM 
 
Student Exploration: Big Bang Theory – Hubble’s Law 
Vocabulary: absolute brightness, absorption spectrum, apparent brightness, Big Bang theory, 
blueshift, Cepheid variable, Doppler shift, Hubble constant, Hubble’s law, luminosity, 
megaparsec, period, redshift, spectrograph 
Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 
Standing by the side of a lonely highway at night, you see two moto...
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GIZMOS Student Exploration: Big Bang Theory – Hubble’s Law 2023 Answered.
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GIZMOS Student Exploration: Big Bang Theory – Hubble’s Law 2023 Answered. 
 
 
 
 
Name:		Date: 	 
 
 
Student Exploration: Big Bang Theory – Hubble’s Law 
 
Vocabulary: absolute brightness, absorption spectrum, apparent brightness, Big Bang theory, blueshift, Cepheid variable, Doppler shift, Hubble constant, Hubble’s law, luminosity, megaparsec, period, redshift, spectrograph 
 
 
Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 
Standing by the side of a lonely highway...
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