1
AP EAPCET 2022 - 4th July Evening Shift
+1
-0

When monochromatic light of wavelength 600 nm is used in Young's double slit experiment, the fifth order bright fringe is formed at 6 mm from the central bright fringe on the screen. If the experiment is conducted with light of wavelength 400 nm from the central bright fringe, the third order bright fringe will be located at

A
1.6 mm
B
2 mm
C
2.4 mm
D
3 mm
2
AP EAPCET 2021 - 20th August Morning Shift
+1
-0

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,

A
all the four will shift in the direction C to O
B
all the four will shift in the direction O to C
C
the images C, B and A will shift towards O
D
the images C, B and A will shift away from O
3
AP EAPCET 2021 - 19th August Evening Shift
+1
-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

A
unchanged
B
halved
C
doubled
D
4
AP EAPCET 2021 - 19th August Morning Shift
+1
-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

A
$$\sin ^{-1}\left(\frac{1}{2}\right)$$
B
$$\sin ^{-1}\left(\frac{3}{4}\right)$$
C
$$\sin ^{-1}\left(\frac{1}{4}\right)$$
D
$$\sin ^{-1}\left(\frac{2}{3}\right)$$
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