1
JEE Main 2021 (Online) 24th February Morning Shift
Numerical
+4
-1
An unpolarised light beam is incident on the polarizer of a polarization experiment and the intensity of light beam emerging from the analyzer is measured as 100 Lumens. Now, if the analyzer is rotated around the horizontal axis (direction of light) by 30$$^\circ$$ in clockwise direction, the intensity of emerging light will be _________ Lumens.
2
JEE Main 2020 (Online) 6th September Evening Slot
Numerical
+4
-0
A Young's double-slit experiment is performed using monochromatic light of wavelength $$\lambda$$. The intensity of light at a point on the screen, where the path difference is $$\lambda$$, is K units. The intensity of light at a point where the path difference is $${\lambda \over 6}$$ is given by $${{nK} \over {12}}$$, where n is an integer. The value of n is __________.
3
JEE Main 2020 (Online) 4th September Evening Slot
Numerical
+4
-0
Orange light of wavelength 6000 $$\times$$ 10–10 m illuminates a single
slit of width 0.6 $$\times$$ 10–4 m. The maximum possible number of diffraction minima produced on both sides of the central maximum is ___________.
4
JEE Main 2020 (Online) 9th January Evening Slot
Numerical
+4
-0
In a Young's double slit experiment 15 fringes are observed on a small portion of the screen when light of wavelength 500 nm is used. Ten fringes are observed on the same section of the screen when another light source of wavelength $$\lambda$$ is used. Then the value of $$\lambda$$ is (in nm) __________.