Light questions | form one Physics

A pin-hole camera 200 mm long produces an image of 2 mm diameter of the sun. If the sun’s distance from the earth is about 1.5x10​^8​ km, what is the diameter of the sun?
A 1.5x10​⁸​ km
B 1.5x10​⁶​ km
C 3x10​⁵​ km
D 7.5x10​⁴km
E 3.0x10​³km

Answer / Solution

UNSOLVED

In a light experiment, the results showed that less light was transmitted and the image was
distorted. Which type of material was used?

1. A translucent material
2. An opaque material
3. A luminous material
4. A transparent material
5. A non-luminous material

Answer / Solution

1. A translucent material