Wednesday

October 22, 2014

October 22, 2014

Posted by **Emily** on Wednesday, January 6, 2010 at 11:03pm.

==> When they say "apparent size", they mean the angle from which one object is viewed by, say, a person (or in this case a pair of eyes). I thought I'd be able to find the angle by using the formula s = r*a (arc length [or diameter] equals the radius times the angle). However, I'm missing the diameter of the eye, so I can't use this formula. Does anyone have any idea how to solve this? Any help is GREATLY appreciated! :)

- Math Analysis -
**drwls**, Thursday, January 7, 2010 at 12:12amApparent size would be a measurement of subtended angle in this case. It would be 1/80 radian, which is 0.72 degrees.

You could also approximate it as arctangent 1/80, and get very nearly the same result

It has nothing to do with the diameter of the eye.

- Math Analysis -
**Emily**, Thursday, January 7, 2010 at 12:30amOhhhhhh I get it now! I was imagining the scenario in a completely different way. Thank you!

**Answer this Question**

**Related Questions**

Honors Pre-Calculus - You are traveling in a car toward a certain mountain at a ...

algebra - In triangle ABC, the size of angle B is 5 times the size of angle A, ...

Physics(Please respond) - An object is solid throughout. When the object is ...

Astronomy - For this question assume the moon is 110 of its diameter away from ...

geometry - In a triangle ABC, angle B is 3 times angle A and angle C is 8 ...

algebra - in triangle ABC, the size of angle B is 5 times the size of angle A ...

physics - another question - Sam is sitting in her fishing boat watching a trout...

physics - You are an astronaut (m = 90 kg) and travel to a planet that is the ...

physics - You are an astronaut (m = 80 kg) and travel to a planet that is the ...

Math - Suppose you did a survey of male shoes size and the mean of that survey ...