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Q. What is Fresnel diffraction?
a) The source as well as the screen are at finite distances from the obstacle producing diffraction.
b) The wave front suffer diffraction is either spherical or cylindrical.
c) The diffracted rays can't be brought to focus with the help of a convex lens.
The main constituents of glass is (A) SiO 2 (B) B 2 O 3 (C) Al 2 O 3 (D) Cr 2 O 3 Ans: The main constituents of glass are SiO 2 .
Q. Explain what is light? Light is certainly electromagnetic radiation but the expression electromagnetic radiation is by no means an explanation of what light is. Light is a w
A pendulum is timed, first for 20 swings and then for 50 swings Time for 20 swings= 17.4s Time for 50 swings= 43.2s Calculate the average time per swing in each case.
#WHAT IS THE PRINCIPLE OF REGULATOR?
Explanation construction and working of Nicol prism?
Define the term multi-mode fibre shortly. Multi-mode fibre: This type of fibre permits more than one mode to travel by this. As this has to permit more number of modes to tr
Ask question #how to work full wave rectifier#
Describe an actual situation that would give rise to the free body diagram
Red light (λ = 685 nm) falls on a slit that is 0.025 mm wide. The distance between the centers of the central bright band and the second-order dark band is 6.3 cm. What is
How to calculate change in entropy.
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