EXERCISE 2: MAGNIFICATION & MEASUREMENT

Magnification

number of times the image of an object is reduced or enlarged by a drawing or a picture

Magnification of Drawing = D (Dimension of Drawing)/S (Actual size of Specimen)

formula of magnification of drawing

10x

LPO

45x

HPO

100x

OIO

10x

Ocular

Total Magnification = Objectives x Ocular

Total Magnification Formula

Micrometer Eyepiece

glass disc provided with calibration called Micrometer Space (msp)

LPO = 1 msp = ? mm

0.015 mm

HPO = 1 msp = ? mm

0.0036 mm

Digital Microscope = 1 msp = ? mm

0.1 mm

Magnification of the Drawing Formula (For Microscopic Specimen)

Magnification of Drawing = D (Dimension of Drawing in mm)/S (Actual Size [msp x cf])

width: 32 cm; height: 40 cm

What is the dimension of the leaf if its size is 8 cm in width and 10 cm in height when it is 4x in magnification?

Total Magnification = 225x

What is the magnification of a cell viewed under HPO with a magnification of 45x and an ocular that has 5x magnification?

Ocular = 10x

If the magnification of a pollen is 300x under OIO what is the magnification of the ocular?

D = 90 mm

What is the dimension of the drawing when the magnification of drawing is 400x and an msp of 15 msp?