SATHEE: Ray Optics and Optical Instruments

Ray Optics and Optical Instruments - Result Question 16

16. An air bubble in a glass slab $(μ = 1.5)$ is $5 c m$ deep when viewed from one face and $2 c m$ deep when viewed from the opposite face. The thickness of the slab is

(a) $7.5 c m$

(b) $10.5 c m$

(d) $10 c m$

[2000]

Show Answer

Answer:

Correct Answer: 16. (b)

Solution:

(b) $1.5 = \frac{Real depth (R_{1})}{Apparent depth (5 c m)}$

$∴ R_{1} = 1.5 \times 5 = 7.5 c m$

For opposite face,

$1.5 = \frac{R_{2}}{2} \Rightarrow R_{2} = 3.0 c m$

$∴$ Thickness of the slab $= R_{1} + R_{2}$

$= 7.5 + 3 = 10.5 c m$

If object and observer are situated in different medium then due to refraction, object appears to be displaced

Refractive index, $μ = \frac{Real depth (h)}{A p p a r e n t d e p t h (h^{'})}$

Real depth > Apparent depth

In case object is in rarer medium and object is in denser medium then, $μ = \frac{h^{'}}{h}$

Real depth < apparent depth

Ray Optics and Optical Instruments - Result Question 16

16. An air bubble in a glass slab $(μ = 1.5)$ is $5 c m$ deep when viewed from one face and $2 c m$ deep when viewed from the opposite face. The thickness of the slab is

Answer:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Ray Optics and Optical Instruments - Result Question 16

16. An air bubble in a glass slab (μ=1.5) is 5cm deep when viewed from one face and 2cm deep when viewed from the opposite face. The thickness of the slab is

Answer:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Menu

16. An air bubble in a glass slab $(μ = 1.5)$ is $5 c m$ deep when viewed from one face and $2 c m$ deep when viewed from the opposite face. The thickness of the slab is