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The microscope used by the student has an eyepiece lens with a magnification of 10× - OCR Gateway - GCSE Biology - Question 5 - 2018 - Paper 1
Question 5
The microscope used by the student has an eyepiece lens with a magnification of 10×. Which objective lens would give an image magnification of 200×? A 10× B 20× C ... show full transcript
Worked Solution & Example Answer:The microscope used by the student has an eyepiece lens with a magnification of 10× - OCR Gateway - GCSE Biology - Question 5 - 2018 - Paper 1
Step 1
Which objective lens would give an image magnification of 200×?
Answer
To find the required objective lens magnification, we use the formula:
Given that the eyepiece magnification is 10× and we need a total magnification of 200×, we can rearrange the formula to find the objective lens magnification:
ext{Objective Lens Magnification} = rac{ ext{Total Magnification}}{ ext{Eyepiece Magnification}} = rac{200×}{10×} = 20×Thus, the correct answer is B: 20×.