A glass (ng=1.5) block of thickness 2.7cm is placed on a postage stamp. What would be the apparent depth of the stamp if it is viewed. Obliquely above the glass slab ?
1.8cm
2.4cm
0.9cm
3.6cm
A
1.8cm
B
0.9cm
C
2.4cm
D
3.6cm
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Solution
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When object is viewed obliquely from the glass surface.
then there is rise in the depth of object depends on the refractive index of glass
A glass (ng=1.5) block of thickness 2.7cm is placed on a postage stamp. What would be the apparent depth of the stamp if it is viewed. Obliquely above the glass slab ?
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Q2
A postage stamp kept below a rectangular glass slab of refractive index 1.5 when viewed vertically above it, appears to be raised by 7.0mm. Calculate the thickness of the glass slab.
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Q3
A postage stamp kept below a rectangular glass block of refractive index 1.5 when viewed from vertically above, it appears to be raised by 7.0 mm. Calculate the thickness of the glass slab.
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Q4
A postage stamp appears raised by 7.0 mm when placed under a rectangular glass block of refractive index 1.5. The thickness of the glass block is
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Q5
A glass slab of thickness 12 mm is placed on a table. The lower surface of the slab has a black spot. At what depth from the upper surface will the spot appear when viewed from above? (Refractive index of glass =1.5)