Q: Which of the following is the correct formula to calculate the field of view at a new magnification?

$\text{FOV}_{\text{new}} = \frac{\text{FOV}_{\text{measured}} \times \text{Magnification}_{\text{measured}}}{\text{Magnification}_{\text{new}}}$

Question 1

When using a compound light microscope, what happens to the field of view (FOV) as you increase the total magnification from 40X to 400X?

Accepted Answer

The FOV decreases in diameter, showing a smaller area at higher magnification.

Question 2

If the field of view at 40X is measured as 3.5 mm, what is the field of view at 1000X? Use the formula $	ext{FOV}_{	ext{new}} = \frac{	ext{FOV}_{	ext{measured}} 	imes 	ext{Magnification}_{	ext{measured}}}{	ext{Magnification}_{	ext{new}}}$.

Accepted Answer

$0.14$ mm

Question 3

A student measures the field of view at 400X as $0.45$ mm. What is the field of view at 40X in mm? Express your answer in scientific notation.

Accepted Answer

$4.5$ mm

Question 4

If your field of view at 400X is $520 \mu$m, what is your field of view at 1000X in mm? (Express your answer in scientific notation.)

Accepted Answer

$2.08 	imes 10^{-2}$ mm

Question 5

Which of the following best describes the relationship between magnification and field of view in microscopy?

Accepted Answer

Field of view is inversely proportional to magnification.

Question 6

Convert $0.32$ mm to pm (picometers). Express your answer in scientific notation.

Accepted Answer

$3.2 	imes 10^{11}$ pm

Question 7

A field of view is measured at $10$X as $1.78 	imes 10^{4} \mu$m. What is the field of view at $40$X in meters? (Express your answer in scientific notation.)

Accepted Answer

$4.45 	imes 10^{-4}$ m

Question 8

Convert $5.75$ mm to cm. Express your answer in scientific notation.

Accepted Answer

$5.75 	imes 10^{-1}$ cm

Question 9

Convert $4.88$ km to mm. Express your answer in scientific notation.

Accepted Answer

$4.88 	imes 10^{6}$ mm

Question 10

Convert $349$ mm to $\mu$m. Express your answer in scientific notation.

Accepted Answer

$3.49 	imes 10^{5}$ \mu m

Question 11

Convert $0.00004$ km to nm. Express your answer in scientific notation.

Accepted Answer

$4.0 	imes 10^{10}$ nm

Question 12

If your field of view at 400X is $0.000047$ km, what is your field of view at 1000X in $\mu$m? (Express your answer in scientific notation.)

Accepted Answer

$1.88 	imes 10^{4}$ \mu m

Question 13

A student observes a specimen at 100X and measures the field of view as $2.0$ mm. What will be the field of view at 400X?

Accepted Answer

$0.5$ mm

Question 14

Why is it important to express measurements in scientific notation when working with microscopic fields of view and conversions?

Accepted Answer

Because scientific notation makes it easier to compare and calculate with very large or very small numbers.

Question 15

If the field of view at 100X is $1.2$ mm, and you switch to 400X, what is the new field of view in $\mu$m?

Accepted Answer

$300$ \mu m

Question 16

A student measures the field of view at 40X as $4.0$ mm. What is the field of view at 400X in $\mu$m?

Accepted Answer

$400$ \mu m

Question 17

Which of the following is the correct formula to calculate the field of view at a new magnification?

Accepted Answer

$	ext{FOV}_{	ext{new}} = \frac{	ext{FOV}_{	ext{measured}} 	imes 	ext{Magnification}_{	ext{measured}}}{	ext{Magnification}_{	ext{new}}}$

Question 18

If you observe a specimen at 1000X and the field of view is $0.14$ mm, how many micrometers is this?

Accepted Answer

$140$ \mu m

Question 19

A student needs to convert $0.00004$ km to nm for a microscopy calculation. Which of the following is the correct conversion process?

Accepted Answer

Multiply $0.00004$ by $10^{12}$

Question 20

Why does the field of view decrease as magnification increases in a compound microscope?

Accepted Answer

Because higher magnification lenses have a smaller diameter, limiting the area visible.

Microscopy: Field of View and Dimensional Analysis in Microbiology

Study Guide - Practice Questions

Study Guide - Flashcards