When the index and horizon mirrors of a...

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Question 1 of 2066636ee928f7522a1c51998b

When the index and horizon mirrors of a properly adjusted sextant are at an angle of 45° to each other, the arc reads __________.

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Question 1 of 20

66636ee928f7522a1c51998b

When the index and horizon mirrors of a properly adjusted sextant are at an angle of 45° to each other, the arc reads __________.

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🔍 Key Concepts

• Double reflection principle of the sextant (the angle between mirrors vs. the angle read on the arc) • Relationship between the index arm position and the angle between the index mirror and horizon mirror • How the sextant scale is marked to show the angle between the two observed objects, not just the mirror angle

💭 Think About

• Think about how the sextant uses two reflections to measure an angle: does the scale show the mirror angle or twice that angle? • If the mirrors are 0° apart (perfectly parallel), what should the sextant read? Then extend that logic to 45° between the mirrors. • Consider what the sextant is actually measuring: the angle between the two lines of sight to the objects, or the physical angle between the mirrors?

✅ Before You Answer

• Be clear on the double-angle effect of reflection in a plane mirror (incident vs. reflected ray). • Recall how the sextant is set when the index error is zero: what is the mirror relationship and what does the arc read then? • Verify whether the reading on the sextant arc is equal to or twice the physical angle between the mirrors.

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Study

Question 1 of 2066636ee928f7522a1c51998b

When the index and horizon mirrors of a properly adjusted sextant are at an angle of 45° to each other, the arc reads __________.

Back

Question 1 of 20

66636ee928f7522a1c51998b

When the index and horizon mirrors of a properly adjusted sextant are at an angle of 45° to each other, the arc reads __________.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed