Question

A hollow spherical ball is cut into two halves. On the
inner surface of one half of the ball, a shiny aluminum
foil is pasted. A candle is placed in between the shiny
surface of the section of the ball and the screen as
shown in the figure.
Screen
Section of
ball
1) Image formed is virtual and smaller in size
II) Image formed is real and smaller in size
Ill Iman formodin virtunt and himoor in rinn​

Answer 1

Answer:

As half of the water in the spherical cup is transferred to the conical cup, half of the volume of water in the spherical cup is equal to the volume of water in the conical cup up to 2cm.

Volume of a cone =

3

1

πr

2

h where r is the radius of the base of the cone and h is the height.

Volume of a sphere of radius

′

r

′

=

3

4

πr

3

Hence,

2

1

× (Volume of sphere) = Volume of the cone

∴

2

1

×

3

4

π×4

3

=

3

1

πr

2

×2

∴r

2

=64

∴r=8cm

Answer 2

Answer:

image formed is real and smaller in size