8th Grade Sextant Quizzes , Questions & Answers

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Mirror Magic: The Double Reflection Mirrors Explained

To see two things at once with perfect accuracy, you have to play tricks with the very nature of light. The secret behind the world's most precise navigational tools is having double reflection mirrors explained to show...

Questions: 20 | Attempts: 11 | Last updated: Feb 25, 2026

Sample Question 1
What is the fundamental principle of double reflection mirrors explained in physics?

Light is absorbed twice by the same surface

A ray of light reflects off two mirrors in a row, doubling the angle of the instrument's movement

Light turns into a rainbow after two bounces

Mirrors work only if they are made of silver

Light travels slower after hitting the second mirror

Sample Question 2
In a sextant, the measured angle between two objects is exactly twice the angle between the two mirrors.

True

False

Sample Question 3
If the angle between the index mirror and the horizon glass is 45 degrees, what is the total angle of the object being measured?

22.5 degrees

45 degrees

90 degrees

180 degrees

0 degrees

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