NOTE : Distance between pins P, and P, and between P3 and PA must be to the emergent angle.
o]
large.
- Activity
the water.
(figure 38).
bottom of a bucket filled with water is less than the real depth of the coin in
4. Describe an activity to show that the apparent depth of a coin at the
(i) Place a fifty paisa coin at the bottom of a bucket filled with water (say
(ii) Look at the coin through water and try to pick up the coin at one go. In
This is because, the coin appears to be raised from its actual position due to
refraction of light as shown in figure. When we try to pick up the coin in
the water, we think that the coin is somewhere above the bottom of the
bucket. The distance from the surface of water to the image of the coin in
upto
20 cm). The real depth of coin in water = 20 cm
is observed that the coin is not picked up at one go.
Apparent
Depth
water is called apparent depth of the coin.
This activity shows that the apparent depth of the coin in water is less than​