Ray Optics and Optical Instruments Previous Year Questions — NEET Physics

2 past-year Ray Optics and Optical Instruments questions from NEET (Physics).

Q19 (2024)

In a concave lens, a ray of light emanating from the object parallel to the principal axis of the lens after refraction:
  1. emerges parallel to the principal axis.
  2. appears to diverge from the first principal focus.
  3. passes through 2F, which is the radius of curvature of the lens.
  4. passes through the second principal focus.
### Related Formula $$\frac{1}{f} = (n-1)\left(\frac{1}{R_1} - \frac{1}{R_2}\right)$$ ### Core Logic For a concave lens, parallel incident rays diverge after refraction. {{SOL_IMG1}} They appear to diverge from the principal focus on the incident side. ### Pattern Recognition Diverging property of concave lens. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 12 Physics: Ray Optics and Optical Instruments

Q23 (2024)

A ray of monochromatic light is passing through an equilateral prism (ABC) as shown in the figure. The refracted ray (QR) is parallel to its base (BC) and the angle of incidence (i) is $50^{\circ}$ . Then the angle of deviation ( $\delta$ ) is: {{IMG1}}
  1. $40^{\circ}$
  2. $45^{\circ}$
  3. $55^{\circ}$
  4. $35^{\circ}$
### Related Formula $$i + e = A + \delta$$ ### Core Logic Since ray QR is parallel to base BC, $i = e = 50^{\circ}$. {{SOL_IMG1}} For equilateral prism, $A = 60^{\circ}$. $$\delta = 2i - A = 2(50^{\circ}) - 60^{\circ} = 40^{\circ}$$ ### Pattern Recognition Parallel internal ray in prism corresponds to minimum deviation condition. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 12 Physics: Ray Optics and Optical Instruments
Rankbit System
JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)

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