WorksheetsChapter 8: Physical Optics
Total questions: 20
Worksheet time: 12mins
Coherent sources are those sources for which
Phase difference remain constant
Frequency remains constant
Both phase difference and frequency remains constant
None of these
Which one is true about destructive interference:
Produce bright fringes
Produce dark fringes
Produce a single wave of greater amplitude (add together)
Have a one full wavelength path difference
Which of the following statements is not true about Young's double slit pattern?
The fringes are equally spaced
A bright fringe occurs when the waves arrive in phase
The sources must be coherent
Replace blue light to red light doesn't affect the fringe width
To demonstrate the phenomenon of interference, we require two sources
Of the same frequency and having a constant phase difference
Of nearly the same frequency
Of the same frequency
Of different wavelengths
Which of the following condition increase the fringe separation?
Cover one of the two slits.
Decrease the distance of the double slit to the screen.
increase the slit separation.
Use a longer wavelength light source.
The top bright fringe order is?
Fourth order minimum
Third order minimum
Fourth order maximum
Third order maximum
If the distance of the slit separation is doubled, the fringe width is:
halved
doubled
no change
The fifth dark fringe of interference pattern is equivalent to:
m=4 maximum
m=5 maximum
m=4 minimum
m=5 minimum
If the space between the double slit and the screen is then filled with water, what happen to the interference pattern?
fringes remain unchange
fringes disappear
fringe increases
fringes decrease
Extra distance travelled by one of waves compared with other is called
path.
displacement.
phase difference.
path difference.
Which of the following statements is untrue when applied to Young's double slit pattern
The fringes are equally spaced
A bright fringe occurs when the waves arrive in phase
The sources must be coherent
The centre fringe is the brightest
The points of the wave front of light are the sources of smaller waves called wavelets.
Huygen
Hubble
Grimaldi
Mahathir
If the index of refraction of the film is higher than air - the reflected ray will undergo a phase shift.
TRUE
FALSE
What is the path difference of the wave traveling through the film?
t
2t
t/2
0
Which diagram best represents the shape and direction of a series of wave fronts after they have passed through a small opening in a barrier?
