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The diffraction pattern of a light of wavelength 400 nm diffracting from a slit of width 0.2 mm is focused on the focal plane of a convex lens of focal
length 100 cm. The width of the 1st secondary maxima will be :
(1) 2 mm 2) 2 cm. 3) 0.02 mm 4) 0.2 mm
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Frequently Asked Questions
How to prepare for IIT-JEE Physics?
To prepare for IIT-JEE Physics, focus on understanding concepts rather than memorizing formulas. Practice solving a variety of problems, especially previous years’ questions. Create a study schedule that covers all topics, with extra time for challenging areas like Mechanics and Electromagnetism. Regular revision and mock tests are essential for success.
What is the difference between reflection and refraction?
Reflection is the bouncing back of light when it hits a surface, following the law that the angle of incidence equals the angle of reflection. Refraction is the bending of light when it passes from one medium to another, governed by Snell’s Law (n₁sin θ₁ = n₂sin θ₂), where n is the refractive index of each medium.
What is the difference between transverse and longitudinal waves?
In transverse waves, the particles of the medium vibrate perpendicular to the direction of wave propagation. Examples include light waves and waves on a string. In longitudinal waves, the particles vibrate parallel to the direction of wave propagation. Sound waves and compression waves in springs are examples of longitudinal waves.
