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National Bird Day: Why Birds Matter to Us

National Bird Day is celebrated every year on 5 January . This day is observed to spread awareness about birds, their importance in nature, and the need to protect them. Birds are beautiful living beings and play a very important role in keeping our environment healthy. Origin of National Bird Day National Bird Day was first celebrated in the year 2002 . It was started by bird lovers and environmental groups to protect birds from dangers like deforestation, pollution, and illegal hunting. The main aim of this day is to teach people, especially students, why birds are important and how we can help save them. Why Is National Bird Day Celebrated Every Year? National Bird Day is celebrated every year because many bird species are disappearing due to human activities. Cutting trees, using plastic, pollution, and climate change are harming birds and their homes. This day reminds us that: Birds need protection Nature should be respected Everyone has a responsibil...
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Verification of Malus law | Third Year Practical Physics

Verification of law of malus 

Sample reading

Determination of P

Angle of incidencePhoto electric currentPhoto electric currentP
(θ)(Imax)(Imin)(Imax - Imin) / (Imax + Imin)
0219360
1027267
2027872
3025628
4027130
5033021
6033744

Determination of 123

Position of Nicol prism (β)Observed value of current (µA)
0243
10194
20176
30164
40219
50232
60220
70146
80122
90190
100125
110243
120202
130220
140265
150226
160226
170216
180274
190268
200252
210260
220250
230236
240206
250162
260124
270105
28098
290110
300250
310187
320264
330250
340273
350224
360225

Note:

  • Above readings are only for reference, students should perform the practical in their laboratory and get their own readings.
  • Students can also note voltage in place of current as an intensity.

Object 4 Inverting and non-inverting Operational amplifier

https://cutt.ly/gkarhFk





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