A bubble in glass slab $$(\mu = 1.5)$$ when viewed from one side appears at $$5$$ cm and $$2$$ cm when viewed from the other side. The thickness of the slab is:
1. $$3.75$$ cm
2. $$3$$ cm
3. $$10.5$$ cm
4. $$2.5$$ cm

Subtopic: Â Refraction at Plane Surface |
Â 83%
From NCERT
AIPMT - 2000
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A ray of light travelling in the air has wavelength $$\lambda$$, frequency $$n$$, velocity $$v$$, and intensity $$I$$. If this ray enters into water then these parameters are $$\lambda', n', v'$$ and $$I'$$ respectively. Which relation is correct?
1. $$\lambda = \lambda'$$
2. $$n=n'$$
3. $$v=v'$$
4. $$I=I'$$

Subtopic: Â Refraction at Plane Surface |
Â 84%
From NCERT
AIPMT - 2001
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A beam of light composed of red and green rays is incident obliquely at a point on the face of a rectangular glass slab. When coming out on the opposite parallel face, the red and green rays emerge from:
 1 Two points propagating in two different parallel directions 2 One point propagating in two different directions through the slab 3 One point propagating in the same direction through the slab 4 Two points propagating in two different non-parallel directions
Subtopic: Â Refraction at Plane Surface |
Â 55%
From NCERT
AIPMT - 2004
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