Ashish Chaudhary

Definition of Modern Quantum Mechanics

Modern quantum mechanics is a fundamental theory in physics that describes the physical properties and behaviors of matter and energy at the atomic and subatomic levels. It provides a mathematical framework for understanding phenomena such as wave-particle duality, quantum entanglement, and superposition, which are essential in explaining the interactions between particles that classical mechanics cannot adequately address.

Key Concepts in Modern Quantum Mechanics

Key concepts include wave functions, which represent the probabilities of a particle's properties; the uncertainty principle, which states that certain pairs of properties cannot be simultaneously measured with arbitrary precision; and quantization, where certain physical properties can only take on discrete values. These concepts revolutionized the understanding of atomic and molecular processes and formed the basis for applications in various fields, such as quantum chemistry, condensed matter physics, and quantum computing.

Historical Context

The development of modern quantum mechanics emerged in the early 20th century, with significant contributions from physicists like Max Planck, Albert Einstein, Niels Bohr, and Erwin Schrödinger. These scientists introduced ideas that challenged classical physics and laid the groundwork for a new understanding of the microscopic world, fundamentally altering the landscape of theoretical physics.

Applications of Modern Quantum Mechanics

Modern quantum mechanics has led to numerous technological advancements and applications, including the development of lasers, semiconductors, and MRI machines. It continues to be a driving force behind research into quantum computing, which has the potential to revolutionize information processing and cryptography.

Unlimited Attempts

According to multiple sources, the National Testing Agency (NTA) has specified that students can attempt the NEET UG exam without any restrictions on the number of attempts134. This means that candidates can register for the exam repeatedly as long as they satisfy the eligibility requirements.

As of now, there is no limit on the number of attempts for the NEET UG exam. Candidates can appear for the exam as many times as they wish, provided they meet the age eligibility criteria.

Difficulty Comparison

NEET UG 2021 received a rating of moderate difficulty overall, with the Physics section being particularly challenging1213. In contrast, NEET UG 2019 was described as having an average difficulty level, with students reporting that Physics was tough but not as strenuous as in 20217.

Subject-Specific Insights

In NEET 2021, while the Biology section was easier and Chemistry was rated from easy to moderate, Physics required more in-depth knowledge and included challenging questions13. Comparatively, NEET 2019 saw Biology as the easiest section, followed by a moderate Chemistry and a tough Physics segment6.

Expert Opinions

Experts noted that NEET 2021's overall quality and difficulty level had improved compared to NEET 2019. This led to expectations of a higher cut-off score for admissions in 2021. Thus, it can be concluded that NEET UG 2021 was indeed tougher than its 2019 counterpart.

1. Exam Format and Syllabus Consistency

The NEET-UG 2018 exam format and syllabus were expected to remain largely similar to those of previous years. There was no official notification regarding changes, and reports indicated that the question patterns would also be unchanged12. Specifically, the CBSE quickly assured that there would be no alteration in the syllabus for NEET 2018, solidifying this consistency34.

2. Official Announcements

Various official updates confirmed a lack of changes regarding the NEET-UG 2018 exam. The CBSE stated that there were no new announcements pertaining to either the syllabus or the examination format, which further supported the expectation of continuity from previous years24.

3. Examination Date Confirmation

It was also mentioned that the NEET-UG 2018 examination was scheduled to be held on May 6, 2018. The exam date was affirmed in multiple sources, cementing the organization's plan for the examination45.

4. Examination Administration

The National Testing Agency (NTA) was responsible for conducting NEET exams from 2019 onward, but during 2018, the Central Board of Secondary Education (CBSE) administered the NEET-UG. There was no indication of changes in this administrative structure for the 2018 examination6.

5. Overall Expectations

Overall, given the lack of announcements and the consistency in examination structure and syllabus, the expectations for NEET-UG 2018 were that it would follow the established norms without any significant modifications.

Academic Qualification: 10+2 or its equivalent with Physics, Chemistry, and Biology.

NEET Eligibility Marks: 

General Category – 50% (PH – 45%)

OBC/SC/ST – 40% (PH – 40%)

Note: Mathematics scores are not considered for this examination.

Age Limit:

Minimum: 17 Years Age

Maximum: No upper age limit

Number of Attempts:

No restrictions on the number of attempts.

Nationality:

Indian Nationals

NRIs, OCIs, PIOs & Foreign Nationals

Score Validity:

One Academic Year