Why do vast glaciers appear blue in colour when seen from a long distance?

1) Due to Rayleigh scattering where light is scattered elastically by particles much smaller than the wavelength of the radiation

2) There is a lack of air bubbles in compressed glacier ice.

Which of the above is/are correct?

Constructive and destructive interference of the light is responsible for rainbow patterns found in

1) Soap bubbles

2) Compact Disk

3) Thin film of oil floating on water

Select the correct answer using the codes below.

In a water vessel, apart from the Height of water column, total pressure exerted at the bottom of a container depends on

1) Height at which the container is placed above Mean Sea Level (MSL)

2) Shape of the water vessel

Select the correct answer using the codes below.

Consider the following about LIDAR.

1) It is a remote sensing technique in which the data is often collected by air.

2) The use of LIDAR is restricted to natural environments.

3) It can be used to generate three-dimensional information about the shape of the Earth and its surface characteristics.

Select the correct answer using the codes below.

Consider the following statements.

1) Sound moves at a much faster speed in ocean water than in air.

2) Distance that sound waves travel in the ocean is independent of ocean temperature and pressure.

Which of the above is/are correct?