Exercise 3.2: Vision Technology

Exercise 3.2: Vision Technology

Check Your Understanding

Go to the websites about Night Vision. Be advised that web pages are often commercial sites trying to sell things. Do not get caught up in what they are selling.

Read the information on these web sites and then answer the following questions.


1. What are night vision devices? Who uses them and why do we need them?

2.  What happens to light waves as they enter the night vision device?

3. Why are the images produced by night vision devices always green?

Go to the websites about Laser Rangefinders. Be advised that web pages are often commercial sites trying to sell things. Do not get caught up in what they are selling.

http://precisionrifleblog.com/2013/10/29/how-do-rangefinders-work/

https://en.wikipedia.org/wiki/Laser_rangefinder

Read the information on these websites and then answer the following questions.

4. What are laser rangefinders?

5. How does a laser rangefinder work?

6. What factors can affect how well a laser rangefinder works over a long distance?

7. Describe 2 different ways that you could use a laser rangefinder.