HARD
12th West Bengal Board
IMPORTANT
Earn 100

How would the angular separation of interference fringes in Young's double-slit experiment change when the distance of separation between the slits and the screen is doubled.

Important Questions on Wave Optics

MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 29
Draw a diagram to show the refraction of a plane wavefront incident in a convex lens and draw the refracted wavefront.
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 30
How does the fringe width in young's double slit experiment, change when the distance of separation between the slits and screen is doubled?
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 31
In Young's double slit experiment performed with a source of white light only black and white fringes are observed. Is this true?
 
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 32
Why should we have narrow sources to produce good interference fringes?
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 33

What will be the effect on the fringes of Young's double slit experimental set-up if immersed in water?

 

HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 34
No interference pattern is detected when two coherent sources are infinitely close to each other. Why? 
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 35
What is the condition for first minimum in case of diffraction due to single slit?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 36
In a double-slit interference experiment, the two coherent beams, have slightly different intensitiesI  and I+δI . Show that the resultant intensity at the maxima is nearly 4I , while at the minima is nearly δI24I