Advertisements
Advertisements
प्रश्न
Write the names of some cold light-emitting objects.
Advertisements
उत्तर
Jugnu, firefly.
APPEARS IN
संबंधित प्रश्न
Write true or false of the following statement.
The moon is a natural source of light.
Write true or false of the following statement.
We can see an object through an opaque medium.
Tick the correct answer.
Light causes
Fill in the blank
Speed of light in vacuum is .................
Answer the following.
List two transparent objects.
Light travels only in a______ It is because of this property that______ are formed.
Write about two everyday situations that tell you that light travels in a straight line.
a) Draw ray diagrams to show how the image is formed using a concave mirror, when the position of object is:
- at C
- between C and F
- between F and P of the mirror.
b) Mention the position and nature of image in each case.
Boojho made light from a laser torch fall on a prism. Will he be able to observe a band of seven colours? Explain with a reason.
A student observes a tree given in the following figure through a pin hole camera. Which of the diagrams given in the following figure (a) to (d), depicts the image seen by her correctly?

