Model Paper 3 Physics - Model Paper 3

• A
  $\frac{a}{f \lambda}$
• B
  $\frac{f a}{\lambda}$
• C
  $\frac{\lambda a}{f}$
• ✓
  $\frac{f \lambda}{a}$

Answer: D.

• A
  Interference fringes are of equal thickness
• B
  The central diffraction fringe is of maximum intensity
• C
  All bright interference fringes are of equal intensities
• ✓
  Diffraction fringes are of equal thickness

Answer: D.

• ✓
  $37^{\circ}$
• B
  $57^{\circ}$
• C
  $47^{\circ}$
• D
  $67^{\circ}$

Answer: A.

• ✓
  $\frac{d}{a}$
• B
  $\frac{d^2}{a}$
• C
  $\frac{a}{d}$
• D
  $\frac{a^2}{d}$

Answer: A.

• A
  $-30$
• B
  15
• ✓
  30
• D
  $-15$

Answer: C.