Image Shift in a Glass Slab

Q. An object is placed in front of a slab $(\mu =1.5)$ of thickness $6\text{cm}$ at a distance of $28\text{cm}$ from it, while the other face of the slab is silvered. Find the position of the final image.

1. $54\text{cm}$ from surface $1$
2. $54\text{cm}$ from surface $2$
3. $36\text{cm}$ from surface $2$
4. $36\text{cm}$ from surface $1$

Q.

An air bubble in a glass slab with refractive index $1.5$ (near normal incidence) is $5cm$ deep when viewed from one surface and $3cm$ deep when viewed from the opposite face. The thickness (in $cm$) of the slab is

1. 12
2. 16
3. 8
4. 10

Q.

An air bubble in a glass slab with a refractive index of $1.5$ (near-normal incidence) is $5cm$ deep when viewed from one surface and $3cm$ deep when viewed from the opposite face. What is the thickness (in cm) of the slab?

Q. The thickness of a glass slab of refractive index 3.5 is 1 cm. The shift in the object when looked through the slab is .

1. 1.5 cm
2. 2 cm
3. 2.5 cm
4. 3 cm

Q.

Calculate the focal length of the thin lens shown in figure. The points $C_1$ and $C_2$ denote the centres of curvature. Refractive index of lens is $1.5$.

1. $20cm$

2. $40cm$

3. $60cm$

4. $80cm$

Q. Rays from a lens are converging toward a point $P$ as shown in figure. How much thick glass plate having refractive index $1.6$ must be located between the lens and point $P$, so that the image will be formed at $P$’?

1. $0.8cm$
2. $1.6cm$
3. $0.8cm$
4. $2.4cm$