M12

Question 1

According to quantum physics and the physics of relativity, matter can be transformed into energy and vice versa. The relationship between energy and
Lmass can be calculated using

Answer 1

Einstein’s theory of relativity.
Energy = mass equivalence x velocity
E = mc²

Question 2

Value of Joule to eV
One Joule

Answer 2

6.24 x 1018 eV
4.15 x 10-15 eV-s 6.63 x 10-34 J-s

Question 3

By using the equation
in
conjunction with the two equations that
relate to EMR, one can calculate the
mass equivalence of a photon when
only the photon wavelength of photon
frequency is known.

Answer 3

E = mc²
E = mc² = hf

Question 4

When light is emitted from a source such as the sun or a light bulb, the intensity
decreases rapidly with the distance from the source. The decrease in intensity
is inversely proportional to the square of the distance of the object from the
source. Mathematically, this is called the

Answer 4

inverse square law and is expressed
as follows:

I1 d2²
I2 d1²