When trying to sight a lighthouse you notice...

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Question 1 of 2066636ee928f7522a1c51a40a

When trying to sight a lighthouse you notice a glare from a town in the background. How does this affect the range at which the light may be sighted?

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Question 1 of 20

66636ee928f7522a1c51a40a

When trying to sight a lighthouse you notice a glare from a town in the background. How does this affect the range at which the light may be sighted?

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🔍 Key Concepts

• Luminous range vs. geographic range of a light • Effect of background lighting (glare/light pollution) on visibility of aids to navigation • How contrast with the background affects when you can first pick out a light

💭 Think About

• Ask yourself whether a light is easier or harder to pick out against a dark, black background versus a bright town full of lights. • Think about whether extra lights in the background make the lighthouse stand out more, or blend in more, when you are looking from far away. • Consider what mariners mean when they say a light is ‘obscured by background lighting’ and how that would affect the range at which you can first identify it.

✅ Before You Answer

• Verify that background glare generally reduces contrast, making a specific light harder to distinguish. • Check whether lighthouse nominal range tables assume a dark background or a brightly lit shore. • Consider whether the color of the light really overcomes strong background glare at long range, or if it is still masked.

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Question 1 of 2066636ee928f7522a1c51a40a

When trying to sight a lighthouse you notice a glare from a town in the background. How does this affect the range at which the light may be sighted?

Back

Question 1 of 20

66636ee928f7522a1c51a40a

When trying to sight a lighthouse you notice a glare from a town in the background. How does this affect the range at which the light may be sighted?

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