List of top Geology and Geophysics Questions on Remote Sensing

Three pixels P, Q, and R in an image are characterized by the NDVI values of +0.84, +0.01, and -0.89, respectively. Which of the following options is/are correct?
A vertical aerial photograph is obtained over flat terrain with a 30 cm focal-length camera lens from an altitude of 18288 m. If the width of a dolerite dyke on this vertical photograph is 2 mm, its actual width on the terrain is $\underline{\hspace{1cm}}$ m. [round off to 2 decimal places]
The intercepts of a crystal face on the crystallographic axes are \( \infty a \), \( 2b \), and \( 3c \). Which one of the following is its Miller Index?
Light passes through two media with refractive indices of 1.75 and 1.55, respectively. The thickness of both the media is 30 mm. The resultant path difference of the yellow light component \( \lambda = 589 \, \text{nm} \) is \(\underline{\hspace{1cm}}\) mm.