- #1
IntellectIsStrength
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Two questions... first one is a lot simpler but I'm still not able to do it for some reason?
1. Alex is prescribed new glasses because he finds it difficult to read his favourite Physics book at a convenient distance of 25 cm. His optometrist recommends lenses of power +2.0 Diopters. What is the maximum distance at which Alex can distinctly see objects (without his glasses)?
2. Samson needs glasses of power -7.5 Diopters. Removing his glasses, he looks into a microscope where a slide of amibae has been inserted. The slide stands at a distance of 1.2 cm from the objective lens of focal lengh 1 cm. The focal length of the eyepiece is 15 cm. In order for Samson to clearly see the amibae, he needs to rotate the knob on the side of the microscope. This adjusts the distane between the two lenses by having the eyepiece move while the objective stays fixed. Determine the separation distance between the two lense which Samson starts to distincly see the amibae.
Can you please just offer some hints as to how to approach the problems?
For the 1st one, I used the thin lense equation but I didn't get the right answer.
Thanks
1. Alex is prescribed new glasses because he finds it difficult to read his favourite Physics book at a convenient distance of 25 cm. His optometrist recommends lenses of power +2.0 Diopters. What is the maximum distance at which Alex can distinctly see objects (without his glasses)?
2. Samson needs glasses of power -7.5 Diopters. Removing his glasses, he looks into a microscope where a slide of amibae has been inserted. The slide stands at a distance of 1.2 cm from the objective lens of focal lengh 1 cm. The focal length of the eyepiece is 15 cm. In order for Samson to clearly see the amibae, he needs to rotate the knob on the side of the microscope. This adjusts the distane between the two lenses by having the eyepiece move while the objective stays fixed. Determine the separation distance between the two lense which Samson starts to distincly see the amibae.
Can you please just offer some hints as to how to approach the problems?
For the 1st one, I used the thin lense equation but I didn't get the right answer.
Thanks