Light-Emitting Diodes (LEDs)
Light-Emitting Diodes (LEDs)
Overview:
- Semiconductor devices - emit light when an electric current is applied.
- Working principle - electroluminescence.
Difference:
- Fluorescent Bulbs:
- Produce light by exciting mercury vapor.
- Mercury vapor emits ultraviolet light.
- Stimulates phosphor coating on the inside of the bulb.
Advantages of LED:
- Energy Efficiency.
- Longevity.
- Instantaneous Illumination.
- Durability.
- Color Range.
- Lower environmental impact.
Practice Question – Prelims
Which of the following semiconductor materials is commonly utilized in the fabrication of Light Emitting Diodes (LEDs)?
(a) Silicon
(b) Germanium
(c) Gallium arsenide
(d) Zinc oxide
Anti-Defection Law
Anti-Defection Law
Overview:
- Defector - person who deserts one political party & moves on to another political party.
- Aims of Anti-Defection Law (ADL):
- Bring down defection.
- Ensure stability of government.
- 52nd Constitutional Amendment Act of 1985 – added 10th schedule.
- 10th schedule disqualifies legislators who get involved in party hopping.
Provisions for Disqualification:
- When a legislator voluntarily gives up membership after getting elected from a political party.
- When a legislator does not obey the decision of party whip.
- Independent legislator joins a political party after getting elected.
- Nominated member joins a political party after 6 months.
Exceptions from Disqualification:
- Member voluntarily gives up the membership of the party - as the original party being merged with another party then he will not be disqualified.
- Presiding officer of the house gives up his party membership.
- Nominated member joins a political party before 6 months.
Other Provisions:
- Decision regarding anti-defection taken by the Presiding officer.
- Kihoto Hollohan case 1993:
- Decision of the presiding officer regarding defection is subjected to judicial review.
- Kihoto Hollohan case 1993:
- Sadiq Ali vs Election Commission of India (1971):
- Three-test formula given by the Supreme court:
- Aims & objective of the party.
- Act as per the party’s constitution & reflecting the inner party democracy.
- Majority in the legislative and organization wings of the party.
- Three-test formula given by the Supreme court:
UPSC 2022 Prelims Question
With reference to anti-defection law in India, consider the following statements:
1. The law specifies that a nominated legislator cannot join any political party within six months of being appointed to the House.
2. The law does not provide any time-frame within which the presiding officer has to decide a defection case.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2



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