NEET 2016 Phase 1 | Wave Optics Question 23 | Physics

In a diffraction pattern due to a single slit of width $$a$$, the first minimum is observed at an angle 30^o when light of wavelength 5000 $$\mathop A\limits^ \circ $$ is incident on the slit. The first secondary maximum is observed at an angle of

sin^$$-$$1$$\left( {{1 \over 2}} \right)$$

$${\sin ^{ - 1}}\left( {{3 \over 4}} \right)$$

$${\sin ^{ - 1}}\left( {{1 \over 4}} \right)$$

$${\sin ^{ - 1}}\left( {{2 \over 3}} \right)$$

NEET 2016 Phase 1

MCQ (Single Correct Answer)

-1

The intensity at the maximum in a Young's double slit experiment is $$I$$₀. Distance between two slits is d = 5$$\lambda $$, where $$\lambda $$ is the wavelength of light used in the expreriment. What will be the intensity in front of one of the slits on the screen placed at a distance D = 10d ?

$${3 \over 4}{I_0}$$

$${{{I_0}} \over 2}$$

I₀

$${{{I_0}} \over 4}$$

AIPMT 2015

MCQ (Single Correct Answer)

-1

At the first minimum adjacent to the central maximum of a single-slit diffraction pattern, the phase difference between the Huygen's wavelet from the edge of the slit and the wavelet from the midpoint of the slit is

$$\pi $$ radian

$${\pi \over 8}$$ radian

$${\pi \over 4}$$ radian

$${\pi \over 2}$$ radian

AIPMT 2015

MCQ (Single Correct Answer)

-1

Two slits in Young's experiment have widths in the ratio 1 : 25. The ratio of intensity at the maxima and minima in the interference pattern, $${{{I_{max}}} \over {{I_{min}}}}$$ is

$${{49} \over {121}}$$

$${4 \over 9}$$

$${9 \over 4}$$

$${{121} \over {49}}$$

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