NEET 2022 Phase 1 | Wave Optics Question 12 | Physics

In a Young's double slit experiment, a student observes 8 fringes in a certain segment of screen when a monochromatic light of 600 nm wavelength is used. If the wavelength of light is changed to 400 nm, then the number of fringes he would observe in the same region of the screen is

NEET 2020 Phase 1

MCQ (Single Correct Answer)

-1

Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of telescope whose objective has a diameter of 2 m is :

1.83 $$ \times $$ 10^-7 rad

7.32 $$ \times $$ 10^-7 rad

6.00 $$ \times $$ 10^-7 rad

3.66 $$ \times $$ 10^-7 rad

NEET 2020 Phase 1

MCQ (Single Correct Answer)

-1

In Young's double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes :

half

four times

one-fourth

double

NEET 2019

MCQ (Single Correct Answer)

-1

In a double slit experiment, when light of wavelength 400 nm was used, the angular width of the first minima formed on a screen placed 1m away, was found to be 0.2^o. What will be the angular width of the first minima, ($$\mu $$_water = 4/3) if the entire experimental apparatus is immersed in water?

0.15^o

0.05^o

0.1^o

0.266^o

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