Keesha is looking at a beetle with a magnifying glass. She wants tosee an uprigh

Question

Keesha is looking at a beetle with a magnifying glass. She wants tosee an upright, enlarged image at the position of her near point,which is 27 cm from her eye. The focallength of the magnifying glass is +4.1 cm.Assume that Keesha's eye is close to the magnifying glass. (a) What should be the distance between themagnifying glass and the beetle? in cm
(b) What is the angular magnification?

(a) What should be the distance between themagnifying glass and the beetle? in cm
(b) What is the angular magnification?

Explanation / Answer

(a) What should be the distance between themagnifying glass and the beetle? in cm

v=-27cm
f=4.1cm
u=?
1/-v-1/u=1/f
-1/u=1/f+1/v=1/4.1+1/27=>
u=-3.559cm
-ve sign indicates that u should be in front of the lens at adistance of 3.559cm
(b) What is the angular magnification?
m=v/u=27/3.559=7.586

Related Questions

Navigate

• Browse (All)
• Browse K
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.