Calculating Magnification

How many microns μm = 1 mm?

• 1,000

• 1,000,000

• 10,000

• 100,000

To calculate magnification of an electron micrograph we use......

• magnification = image size x actual size

• magnification = image size ÷ actual size

• magnification = actual size ÷ field of view

• magnification = ocular lens x objective lens

To calculate the image size of an electron micrograph if we use.....

• Image size = Actual size x Magnification

• Image size = Magnification ÷ Actual size

• Image size = Actual size ÷ magnification

• Image size = Magnification x Actual size

Josie measured the scale bar image to be 80 mm. What is the Magnification of this electron micrograph?

I = AM

• 160X

• 0.00625 X

• 0.16X

• 25,000X

If the scale bar measures 60 mm and the actual size it represents is 30 μm , what is the magnification?

• 2,000X

• 150X

• 5,000X

• 20X

If a scale bar measures 32 mm and it states it's length is 100 μm, what is the magnification?

• 320 x

• 3,200 x

• 0.32 x

• 32,000 x

If a bacteria image measures 450 mm and the magnification is 15,000x, what is the actual size of the bacteria?

• 30 µm
• 0.3 µm
• 300 µm
• 3,000 µm

Tags

NGSS.MS-LS1-1

Serena measured the image of one of the bacterial cells to be 32 mm. If the magnification of the image is 8,000X, what is the actual size of the bacterial cell?

• 4 μm

• 0.004 μm

• 256,000 μm

• 0.25 μm

Tags

NGSS.MS-LS1-1

What steps should Burt use follow to calculate the actual size of each bacterial cell?

• Step 1: Calculate the magnification by measuring the scale bar image ÷ actual size

  Step 2: Measure image of bacterial cell ÷ magnification

• Step 1: Calculate the magnification by measuring the scale bar image x actual size

  Step 2: Measure image of bacterial cell ÷ magnification

• Step 1: Measure the image of the bacterial cell

  Step 2: Divide the image size by the scale bar size

• He can't, it is impossible to calculate

The scale bar of measures 3 mm but its actual size is 50 nm. What is the magnification of this image?

Remember: 1 mm = 1,000,000 nm

• 60,000X

• 60X

• 600X

• 6,000X