EASY
12th ICSE
IMPORTANT
Earn 100

What will be the effect on the width of the central bright fringe in the diffraction pattern of a single-slit if:

(i) monochromatic light of smaller wavelength is used,

(ii) slit is made narrower?

Important Questions on Diffraction of Light

EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 8 - Diffraction of Light>QUESTIONS>Q 1
State any one difference between interference of light and diffraction of light.
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 8 - Diffraction of Light>QUESTIONS>Q 2
State one similarity and one difference between interference and diffraction of light.
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 8 - Diffraction of Light>QUESTIONS>Q 3
Ray optics assumes that light travels in straight lines.  Light, however, bends round the edges of obstacles and apertures (diffraction). Yet, ray optics correctly locates images in optical instruments. Justify the validity of ray optics.
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 8 - Diffraction of Light>QUESTIONS>Q 4
What is meant by diffraction of light?
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 8 - Diffraction of Light>QUESTIONS>Q 5
Why is diffraction not observed when a ‘wide’ slit is illuminated by monochromatic light?
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 8 - Diffraction of Light>QUESTIONS>Q 6
Coloured spectrum is seen when we look through a muslin cloth, but not through coarse cloth. Why?
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 8 - Diffraction of Light>QUESTIONS>Q 7
Why is diffraction common in sound but not common in light? (or, why can sound waves be diffracted more easily than light waves?)
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 8 - Diffraction of Light>QUESTIONS>Q 8
Radio waves diffract strongly around buildings, but light waves, which are also electromagnetic waves, do not. Why?