A pepper seed is placed in front of a lens.The lateral magnificationof the seed is +0.300.The absolute value of the lens’s focallength is 40.0 cm. How far from the lens is the image?

A 1.40 cm-high object is placed 4.00 cm to the left of a converging lens of focal length 8.00 cm. A diverging lens of focal length –12.00 cm is 5.00 cm to the right of the converging lens. (a) Find the position of the final image. 4.91 cm in front of the second lense 4.91 cm behind the second lense 6.24 cm behind the second lense 6.24 cm in front of the second lense (b) Find the height of the final image. 2.8 cm 1.34 cm 1.46 cm 0.67 cm (c) Is the final image inverted or upright? (d) Is the final image real or virtual?

An examination reveals that a patient cannot clearly see any object that lies closer than 68.4 cm to the patient's eye. (a) Which of the following terms best describes this distance? O magnification Onear point O focal length O far point (b) The patient needs to be able to clearly see objects that are just 23.0 cm distant. A contact lens is prescribed. What focal length (in cm) should this lens have? Assume the lens can be modeled as an ideal thin lens, which lies adjacent to the eye. cm (c) What is the power, P, of the contact lens (in diopters)? diopters

The focal length of a diverging lens is negative. If f = −16 cm for a particular diverging lens, where will the image be formed of an object located 45 cm to the left of the lens on the optical axis? cm to the left of the lensWhat is the magnification of the image?

an object of height 5 cm is placed 20 cm in front of a converging lens at focal length 10 cm. Behind the converging lens, and 25cm from it, there is a diverging lens of the focal length of 6 cm. Find the location of the final image, in centimeters, with respect to teh diverging lens. what is the magnification of the final image? what is the height of the final image?

A compound microscope has a barrel whose length is 16.0 cmand an eyepiece whose focal length is 1.4 cm. The viewer has a near pointlocated 25 cm from his eyes. What focal length must the objective have sothat the angular magnifi cation of the microscope will be -320?

What power of spectacle lens is needed to correct the vision of a nearsighted person whose far point is 40.0 cm? Assume the spectacle (corrective) lens is held 1.80 cm away from the eye by eyeglass frames

The image distance for the lens of a person's eye is2.10 cm.Calculate the focal length of the eye's lens system for anobject (a) at infinity, (b) 500 cm from the eye, and (c) 25 cm from the eye.

A converging thin lens has a 9.0 cm focal length. A 2.0-cm-tall object stands30 cm in front of this lens. Find the position and size (in absolute value) of the image formed bythis lens.

if the focal length is negative, is the focal point benind or in front a -4.5D lens?