Exam

Electromagnetic waves do not require a medium to propagate because they generate self-sustaining oscillations of magnetic and electric fields. Hence, it can travel through the vacuum of space. A changing magnetic field generates an electric field and vice versa. This property allows the wave to carry energy across space. The phenomenon is applicable to sunlight and other forms of EM radiation that travel through space to reach Earth. They cover millions of kilometers while reaching Earth. The EM wave theory is fundamental to understanding phenomena like cosmic observations, satellite communication, and solar radiation.

The entire range of electromagnetic radiation, arranged to increase and decrease the wavelength is called the electromagnetic (EM) spectrum. In the following order, it includes - radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. All these regions have unique properties and applications. For example, X-rays used in medical imaging,  visible light in everyday vision, infrared in remote controls and thermal imaging and radio waves are used in communication. This is an important concept that helps in classifying and utilizing different EM waves.

Yes, there may be a difference in the fee structure based on VITEEE rank as there are different criterias set for students according to their ranks and category.

To perform better in BITSAT examination you should go through JEE Mains crash course which may cover entire topics that may be asked in BITSAT examination 

UPSC exams is generally considered tougher due to its broader and more unpredictable syllabus, plus the intense competition for limited positions, and the subjective nature of the evaluation, testing not just knowledge but also analytical skills, articulation, and personality. CA is considered highly challenging within its specialised domain, demanding rigorous technical knowledge and consistent performance across multiple stages. However, it depends on the indvidual aptitude and field of interest at the end of the day. 

CA is tougher due to its longer duration, extensive syllabus covering diverse subjects, and the cumulative nature of the exams. JEE Main, while intensely competitive and requiring strong conceptual clarity, is a one-time entrance exam.

So in simple words, JEE Main's difficulty is based on high competition and intense pressure in a single exam, while CA's difficulty lies in its extensive syllabus, the need for consistentency across multiple stages over a longer period, and the relatively low pass rates at each level.