1. About me
Name : S T Yogaraj Designation : Assistant Professor College : K.S.Rangasamy college of technology, Tiruchengode, Tamilnadu. FLIPPED CLASS ROOM ACTIVITY Domain : Basic Sciences Topic : Basic Sciences and Allied

2. S T Yogaraj TOPIC – numerical aperture of an optical fiber
COURSE – Fibre optics
BASIC SCIENCES
1st YEAR UG STUDENTS
K.S.RANGASAMY COLLEGE OF TECHNOLOGY, TAMILNADU

3. Out-of-class Activity Design -1
Learning Objective(s) of Out-of-Class Activity
At the end of watching videos students should be able to
Understood the concept of total internal reflection
Understood the construction and working principle of numerical aperture of a fibre
Key Concept(s) to be covered
Construction
working

4. Out-of-class Activity Design - 2
Main Video Source URL
License of Video
Standard YouTube License -
Mapping Concept to Video Source
CONCEPT
VIDEO SEGMENT
DURATION
(in min)
Wavelength measurement
0.20
TOTAL DURATION
Provide total duration of video here**
* It is recommended to provide customized shortened URLs, as they are easier to remember for future use.
** It is recommended that total duration of video watching and activity should not be more than 1Lecture duration.

5. Out-of-class Activity Design - 3
Aligning Assessment with Learning Objective
Learning
Objective
Assessment Strategy
Expected duration
(in min)
Additional Instructions (if any)
Numerical aperture of a fibre
Formula and applications
4.00 mins
TIR, diffraction and angular spread
Expected activity duration
33 minutes
** It is recommended that total duration of activity and video should not be greater than one lecture duration.

6. In-class Activity Design -1
Learning Objective(s) of In - Class Activity
Numerical aperture – light gathering capacity of a fibre
Key Concept(s) to be covered
Manipulating the formula
Doing the calculations distance from Fibre end to circular image on the screen

7. In-class Activity Design -2
Active Learning activity(ies) that you plan to do
Real world problem solving using – Think-pair-share
Concept clarification using – peer instruction

8. In-class Activity Design -2
Explain the strategy by giving details of
What teacher will do?
Why we are using semiconductor laser? [1.30]
Why plastic fibre used instead of glass fibre? [2.08]
How to do measurements? [ ]
1. What Student will do?
They will discuss about the different types of laser.
Knowledge about the classification of optical fibers.
Executing the formula

9. In-class Activity Design -2
Justify why the above is an active learning strategy
the students can find the numerical aperture and also the acceptance angle of a optical fibre by using laser as a source