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If $$\sigma $$ is the total cross-section and f(θ), θ being the angle of scattering, is the scattering amplitude for a quantum mechanical elastic scattering by a spherically symmetric potential, then which of the following is true? Note that k is the magnitude of the wave vector along the $${{\bf{\hat z}}}$$ direction.
Consider the following statements
1. The sky appears blue because of scattering.
2. The main cause of seven colors of the rainbow is scattering of light.
3. At the time of sunrise, the sun appears red, due to scattering of light.
Choose the correct statement/s from the given options
Linear scattering effects are _______ in nature.
Which of the following is true regarding the metallic nature of minerals? I. Metallic nature is directly proportional to electropositive nature. II. Metallic nature in period increases. III. Metallic nature in groups increases.
Consider a discrete-time system which satisfies the additivity property, i.e., if the output for u1[n] is y1[n] and that for u2[n] is y2[n], then output for u1[n] + u2[n] is y1[n] + y2[n]. Such a system is : 1. Linear 2. Non-linear 3. Sometimes Linear and Sometimes non-linear
The Coordinator of an International Virtual Conference has planned six guest lectures on different areas-Cryptography, Fluid Dynamics, Big Data Analysis, Wavelet Theory, Differential Equations and Linear Algebra-to be organised only one on each day from Monday to Sunday.  Wavelet Theory should be organised immediately after Differential Equations.  Big Data Analysis should be organised on Wednesday and should not be followed by Linear Algebra.  Fluid Dynamics should be organised on Friday and there should be a gap of two days between Cryptography and Linear Algebra.  One day there will be no lecture (Saturday is not that day), and just before that day Linear Algebra will be organised. How many lectures are organised between Big Data Analysis and Wavelet Theory? 
Rayleigh scattering and Mie scattering are the types of – 
Given below are two statements - one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Rayleigh scattering is responsible for the blue colour of the sky. Reason (R): Rayleigh scattering occurs, when atmospheric particles have diameters that are small relative to the wavelength of radiation Select the correct answer from the options given below:
Rayleigh scattering and Mie scattering are the types of _____________
Tropospheric scattering, if falls under low frequencies then it leads to Ionosphere scattering.