SABRINA
This page lists questions and answers that were posted by visitors named SABRINA.
Questions
The following questions were asked by visitors named SABRINA.
WHATS THE ANSWER TO #7 DOWN
13 years ago
A child of height 1.2 metres stands 3 metres from the foot of a lamp post of height 2.8 metres, at the top of which there is a small source which can be considered as a point. What is the length of the shadow cast by the child upon the ground?
13 years ago
would what the nature of the shadow on the floor be if the point of source of light is replaced by a luminous disc of diameter 5 cm, whose centre lies directly above the centre of the card?
13 years ago
please help A circular opaque disk, 25 cm in diameter, is set up 30 cm from a circular source of light of diameter 40 cm. A screen is placed 30 cm beyond the opaque disk. Describe, giving dimensions, the nature of the shadow on the screen
13 years ago
Answers
The following answers were posted by visitors named SABRINA.
is it D/5.8= 1.2/2.8 D= (5.8x1.2)/2.8 D= 2.48m ??
13 years ago
THANK YOU!
13 years ago
WHAT DOES PI STAND FOR?
13 years ago
thank you would what the nature of the shadow be if the point of source of light is replaced by a luminous disc of diameter 5 cm, whose centre lies directly above the centre of the card?
13 years ago
thank you what would the dimension of shadow be?
13 years ago
thank you
13 years ago
can someone help? i am really struggling
13 years ago
could i have a clue or a starting point please?
13 years ago
thanks for your help
13 years ago
i have worked out the diameter of the umbra to be 25 cm, is this correct?....
13 years ago