Sunday

March 29, 2015

March 29, 2015

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**

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

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

physics - the focal length of this mirror is 6 cm and the object is located 8 cm...

Physics Help! - A 1 kg object is located at a distance of 1.7 x 10^6 m fom ...

Physics - An object is placed to the left of a lens, and a real image is formed ...

physics - An object (with charge -4.2 µC and mass 0.024 kg) hovers at rest above...

physics - An object (with charge -4.2 µC and mass 0.024 kg) hovers at rest above...

Physics Fluids - When a crown of mass 14.7 kg is submerged in water, an accurate...

astro - The intensity of an object is related to the distance d to the observer ...

Physical Science - How does the apparent weight loss of the an object compare ...