State the property of light associated with the formation of shadows​

Whenever light(and waves in general) reach an obstacle, they bounce off. Shadows appear simply because, the light that was falling on that area or spot is being shielded.

what is the question because that is not a question.

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.