We know, W = m * g
1250 = m * 9.8
m = 1250 / 9.8
m = 127.55 KG
In short, Your Answer would be 127.55 Kg
Hope this helps!
Answer:

Explanation:
= Intensity of unpolarized light = 
= Angle of the filter = 
Intensity of light is given by

The intensity of light detected by the camera is 
The answer would be C. Gamma Rays and High Frequency EM waves travel at the speed of light and are transverse waves.