Chapter#Light

1.two light waves are coherent if they are obtained from a single monochromatic source by:a.division of amplitudeb.division of wavefrontc.bothd.none

2.if convex lens cut in to two equal halves along the lens diameter ...focal length of each half?a)fb)2fc)f/2d)3f/2
3.cnvex lens of focal length f1 and cncave lens of focal length f2 are placed in cntct then focal length of cmbination?a)f2 +f1b)f2-f1c)f1f2/f2+f1d)f1f2/f2-f1
4.monochromatic lit passews frm dencer medium to rare then its?a)wave length decreasesb)frequency decreasesc)velocity decd)velocity increases
5.the light coming frm the sun with
cylindrical wavefronts
plane wavefronts
spherical wavefronts
none
6.which experment does show that light has shorter wave length than sounda)diffractionb)reflectionc)refractiond)interference
7.two sources of light are said to b coherent if they have same?a)wavelengthb)amplitudec)wave length and amplituded)wave length and cnstnt phase difference
8.basicaly wavefronts are divided into___ types
1
2
3
4
9.longitudianl waves do nt exhibit
reflection
refraction
diffraction
polarization
10.when light incident normaly on thin film , the path diff. depends upom
thickness of the film
nature of the film
angle of the incidence
all
none
11.which is not opticaly active
sugar
tartaric acid
water
none
12.the contrast in the fringes in any interfernce attern depends on:
fringe widt
hwavelength
intensity ratio of the sources
distance between the sources