Guru Gobind Singh Indraprastha Vishwavidyalaya 2010-1st Year B.Tech sessional (Applied Physics) -Maharaja Agrasen Institute of Technology - Question Paper
MAHARAJA AGRASEN INSTITUTE OF TECHNOLOGY
(GURU GOBIND SINGH INDRAPRASTHA UNIVRERSITY)
ROHINI, SECTOR -22, NEW DELHI
Ist Semester
B.TECH (FIRST TERM)
APPLIED PHYSICS - 1
(I'Mease write \ir Roll No. in>niv<lisitcly) . .x-.uii Uoll I
first term kx ami nation
/
Kirs I Scim\s(er (D.Tecli.) September 2010
P;ipcr Code: ETPH-103 Sul>. Applied fhysiei-1
lime: 1.5! fours Max.MarUs-30
Note: Q.No.! is compulsory. Attempt any two more questions.
QI. a) Give lew important conditions for obtaining sustained interference pattern \_
b) Vv'iia; are Newtons rings? Why is the central ring dark when observed in reflected light.
c) I v-'O j>I:i:surlnccs in contact nlong one me soparaloil at the oppo.ilU edge by a thin were .[f 20 fringes are observed between these edges in sodium light lor normal incidence, find the thickness of the wire.
d) Oelinc (i > Optic axis (ii) principal section of a crystal .
:} i >i ffovn!!<:<u 'ictwccn dispersive power and resolving power of a jrn'.nv.'.
02. :i) I c ! I sc construction and working s-.f a Miche'.sons i".tci icronv-'.ci.
i \ij; .in ir can N* w.-ri fo dctenv rte (D the wavelength of monoum.vii'uK. itgV.1 in) l/iu oil iciuii'. c in wav.-lengths very close to each uher. V-1
h) A ihiii 11Jii >i plastic tl rclraclivc index !.l::> for light of .wavelength jS90A in inserted normal iy in ihe prith of one of the interfering beams. The central bright., band shifts through 5 fringes. Find the thickness of the giass plate. i.31
Q3. a) Discuss the phenomenon of diffraction at a straight edge. Show ihe intensity disiribtilion in the diffraction pattern and comment on its features. [7\
l>) In a plane transmission grating with 5000 lines per cm, which order of the spectra will be absent if width of opaque spaces are exactly 2.0 times the width of transparent spaces. \3i
Q4. si; Explain the phenomenon of double refraction with the help of a neat diagram. Also coinpare the properties of ordinary and extraordinary rays. [5
b) State Brew sters !;nv. Use it to prove that when light is incident on a transparcn substance al llic polarizing angle, the reflected and the refracted rays are at right angles io each other. \-'
c) What will be the Brewsters angle for a glass slab (p:-1.5) immersed \\\ waver.
01-1.33) - >
|
Attachment: |
| Earning: Approval pending. |
