Student Login

Home›Chapters›Ray Optics PYQs›Refraction, Glass Slab & Apparent Depth›Question 3

MHT CET 2026 (13 May, Shift 2) · Refraction, Glass Slab & Apparent Depth

Refraction, Glass Slab & Apparent Depth question from MHT CET 2026 (13 May, Shift 2)

Q3MHT CET 2026 · 13 MAY · SHIFT 2Easy

Refraction, Glass Slab & Apparent Depth

How much water should be filled in a container of height $21$ cm, so that it appears half filled to the observer when viewed from the top of the container? ( $\mu = 4/3$ )

Show answer and solution

Answer: (c)

Let water height be $h$ ; it appears $\frac{h}{\mu} = \frac{3h}{4}$ deep, and the air column is $21 - h$ .
Appears half filled: apparent water depth = air column, $\frac{3h}{4} = 21 - h$
$\frac{7h}{4} = 21 \Rightarrow h = 12\text{ cm}$
So the answer is (c) 12 cm.

Report a mistake

More questions on Refraction, Glass Slab & Apparent Depth

A glass slab of thickness 6.0 cm is placed on the piece of paper on which an inkdot is…MHT CET 2026 (19 Apr, Shift 1)
A ray of light passes from the vacuum into a medium of refractive index 'n'. If the angle…MHT CET 2026 (16 Apr, Shift 2)
Light ray incident along a vector AO(AO = 2i - 3j) emerges out along vector OB(OB = Ci -…JEE Main 2026 (8 Apr, Shift 2)
Three immiscible transparent liquids with refractive indices 3/2, 4/3 and 6/5 are…MHT CET 2026 (13 May, Shift 1)
Consider three media P, Q and R with refractive indices 1, 1.25, and 1.5 respectively…NEET 2026 (Re-neet)
An unpolarised light is incident at an interface of two dielectric media having…JEE Main 2026 (24 Jan, Shift 1)
What is the lateral shift of a ray refracted through a parallel-sided glass slab of…JEE Main 2025 (23 Jan, Shift 1)
Let the speed of light and the polarising angle for a given medium be ' V ' and ' ip '…MHT CET 2025 (23 Apr, Shift 1)