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Question 19N.3.SL.TZ0.b

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Date November 2019 Marks available [Maximum mark: 2] Reference code 19N.3.SL.TZ0.b
Level SL Paper 3 Time zone TZ0
Command term Calculate Question number b Adapted from N/A
b.
[Maximum mark: 2]
19N.3.SL.TZ0.b

A small object is placed at a distance of 2.0 cm from the objective lens of an optical compound microscope in normal adjustment.

The following data are available.

Magnification of the microscope   = 70
Focal length of the eyepiece         = 3.0 cm
Near point distance                       = 24 cm

Calculate, in cm, the distance between the eyepiece and the image formed by the objective lens.

[2]

Markscheme

«image is virtual so» v=-24 «cm» ✔

«1u=13.0+124» so u=27 «cm» ✔

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