- 1(current)
Q. No.A light beam traveling along the \(x\text-\)axis with a planar wavefront is incident on a medium of thickness \(t\). In the region, where light is falling, the refractive index can be taken to be varying such that \(\dfrac{dn}{dy}>0.\) The light beam on the other side of the medium will emerge:
| 1. | parallel to the \(x\text-\)axis |
| 2. | bending downward |
| 3. | bending upward |
| 4. | split into two or more beams |
From NCERT
Subtopic: Huygens' Principle |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySound waves travel faster in water than in air. Imagine a plane sound wavefront incident at an angle \(\alpha\) at the air-water interface; the refracted wavefront making an angle \(\beta\) with the interface. Then,
| 1. | \(\alpha>\beta\) |
| 2. | \(\beta>\alpha\) |
| 3. | \(\alpha=\beta\) |
| 4. | the relation between \(\alpha~\&~\beta \) cannot be predicted. |
From NCERT
Subtopic: Huygens' Principle |
To view explanation, please take trial in the course below.
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To view explanation, please take trial in the course below.
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Please attempt this question first.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPlane waves of light of wavelength \(\lambda\) are incident onto a convex lens, and the beam is brought to a focus. A plane slab of thickness \(t\) having refractive indices \(\mu_1,~\mu_2\) in the upper and lower halves is placed parallel to the incoming wavefronts. The phase difference between the wavefronts at the focus, coming from the upper and lower halves of the slab is:
| 1. | \(\dfrac{2 \pi}{\lambda}\left[\left(\mu_{1}-1\right) t+\left(\mu_{2}-1\right) t\right]\) |
| 2. | \(\dfrac{2 \pi}{\lambda}\left(\mu_{1}-\mu_{2}\right) t\) |
| 3. | \(\dfrac{2 \pi}{\lambda}\left(\dfrac{t}{\mu_{1}}-\dfrac{t}{\mu_{2}}\right)\) |
| 4. | \(\dfrac{2 \pi}{\lambda}\left(\dfrac{t}{\mu_{1}}+\dfrac{t}{\mu_{2}}\right)\) |
From NCERT
Subtopic: Huygens' Principle |
To view explanation, please take trial in the course below.
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To view explanation, please take trial in the course below.
NEET 2026 - Target Batch - Vital
Please attempt this question first.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
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