Axis Exam ANVE Topic 5 Question 97 Discussion

Actual exam question for Axis's ANVE exam

Question #: 97
Topic #: 5

If an object is placed 1 m (3 ft) away from a light source and the lux level is 3200 lux, what is the lux level at a distance of 8 m (24 ft)?

A50 lux

B10 lux

C400 lux

D200 lux

Show Suggested Answer

Suggested Answer: A

If an object is placed 1 meter (3 feet) away from a light source with a lux level of 3200 lux, the lux level decreases according to the inverse square law of light. At a distance of 8 meters (24 feet), the lux level can be calculated as:

NewLuxLevel=3200lux(8/1)2=3200lux64=50luxtext{New Lux Level} = frac{3200 text{ lux}}{(8/1)^2} = frac{3200 text{ lux}}{64} = 50 text{ lux}NewLuxLevel=(8/1)23200lux=643200lux=50lux

Thus, at 8 meters, the light intensity drops significantly to 50 lux.

by Rikki at Sep 18, 2024, 05:54 AM

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Kimberlie

27 days ago

This question is brighter than a thousand suns! Just kidding, but really, it's not that hard. The answer is clearly C) 400 lux. I mean, come on, it's not rocket science.

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Tegan

20 hours ago

No way, I believe it's D) 200 lux.

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Earleen

5 days ago

I think the answer is C) 400 lux.

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Nikita

1 months ago

Wait, what? I thought this was supposed to be a lighting question, not a math problem. Ugh, I guess I'll just have to guess. I'll go with B) 10 lux, because why not?

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Scarlet

1 months ago

Easy peasy! Just plug the numbers into the formula and you get the answer. C) 400 lux, no doubt about it.

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Deeanna

1 months ago

So, the lux level at 8 m would be lower than 3200 lux. I think the answer is B) 10 lux.

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Estrella

2 months ago

I agree with Dianne. The lux level will decrease because the light spreads out.

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Dianne

2 months ago

I think the lux level will decrease as the distance increases.

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Yolande

2 months ago

Woah, this question is a real brain-teaser! I'm gonna have to break out my calculator for this one. Okay, got it - the answer is C) 400 lux.

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Yvonne

1 months ago

That was a tricky one, but C) 400 lux makes sense.

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Clorinda

1 months ago

I agree, it's definitely C) 400 lux.

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Alton

1 months ago

I think the answer is C) 400 lux.

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Filiberto

2 months ago

Hmm, I remember learning about the inverse square law in physics. Let's see, if the distance increases by a factor of 8, the intensity should decrease by a factor of 64. So the answer must be C) 400 lux.

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