Pls solve q8 in detail the more precise, 11
at spaced wavelengths.
at For two nearly equal wavelengths | and 2 bet
which a diffraction grating can just barely disting
resolving power R of the grating is defined as
where, + X 2)/2 and AX = Z 2 -RI.
7. A slit of width d is illuminated by white light. For
(X = 6500 Å), the first minima is obtained at 0 =
Then, the value of d will be
(a) 3250Å
(c) 1.24 microns
6.5 x 10-4mm
(d) 2.6 x 10-4 cm
electr
, fiel
dire
perpen
e of po
tnary light (
.:Æd in all
fil
with
8. The light of wavelength 6328 Å is incident on a
0.2 mm perpendic rly, the angular fringe widt
(a) 0.360 (b 0.180
(c) 0.720 (d)
9. A diffraction pattern is obtained using a beam
What happens, if the red light is replaced by bl
(a) No change
(b) Diffraction bands become narrower and cr
(c) Diffraction bands become broader and farther
(d) Bands disappear
10. Direction of the first secondary maximum in th
diffraction pattern at a single slit is given by (a
the slit)
(a) asin
31
it of width
will be
red light.
light?
together
art
Fraunhofer
the width
