A point object is placed at the centre of a glass sphere of radius 6 cm and refractive index 1.5. The distance of the virtual image from the surface is: [2004]

Question

A point object is placed at the centre of a glass sphere of radius 6 cm and refractive index 1.5. The distance of the virtual image from the surface is: [2004]

Smart Achievers · Accepted Answer

(1)

Distance of virtual image from surface = 6 cm

The rays coming from the point object fall on the glass-air interface normally and hence pass undeviated. Therefore, if we retrace the path of the refracted rays backwards, the image will be formed at the centre only.

Solution

Q.
A point object is placed at the centre of a glass sphere of radius 6 cm and refractive index 1.5. The distance of the virtual image from the surface is: [2004]

1 6 cm

2 4 cm

3 12 cm

4 9 cm

Ans.
(1)

Distance of virtual image from surface = 6 cm

The rays coming from the point object fall on the glass-air interface normally and hence pass undeviated. Therefore, if we retrace the path of the refracted rays backwards, the image will be formed at the centre only.

Want Us to Email you About Special Offers & Updates?