AP EAPCET 2021 - 20th August Morning Shift | Wave Optics Question 4 | Physics

The position of the direct image obtained at O, when a monochromatic beam of light is passed through a plane transmission grating at normal incidence is shown in figure. The diffracted images A, B, and C correspond to the first, second and third order diffraction. When the source is replaced by another source of shorter wavelength,

AP EAPCET 2021 - 20th August Morning Shift Physics - Wave Optics Question 4 English 1

all the four will shift in the direction C to O

all the four will shift in the direction O to C

the images C, B and A will shift towards O

the images C, B and A will shift away from O

AP EAPCET 2021 - 19th August Evening Shift

MCQ (Single Correct Answer)

-0

In Young’s double slit experiment, the separation between the slits is halved and the distance between the screen is doubled. The fringe width is

unchanged

halved

doubled

quadrupled

AP EAPCET 2021 - 19th August Morning Shift

MCQ (Single Correct Answer)

-0

In a diffraction pattern due to a single slit of width $$a$$, the first minimum is observed at an angle $$30 \Upsilon$$ when light of wavelength $$500 \mathrm{~nm}$$ is incident on the slit. The first secondary maximum is observed at an angle of

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

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

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

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

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