Q1
Why is the pinhole of a pinhole camera kept small?
Answer:
The smaller the pinhole , the smaller and sharper the point of light that the flashlight creates .
Q2
Why should we never look directly at the sun?
Answer:
T he sun radiates ultraviolet radiations that could be extremely harmful for our eyes . This is why we should never see the sun with naked eye.
Q3
The most important source of light for earth is ______
Answer:
The Sun is the major source of light for the earth.
Q4
State whether true or false: A pinhole camera uses Lens to form a real and inverted image
Answer:
Pinhole cameras use a very small hole instead of a lens.
So, the statement is False.
Q5
Name the device which can be used to see things on the other side of a high wall
Answer:
A periscope can be used to see things on the other side of a high wall.
Q6
What is the color of the shadow formed?
Answer:
Irrespective of the colour of the object, the shadow formed is always black.
