Stars are ________________ .

Which of the following is a translucent object ?

Which of the following is convergent Beam of light ?

In which of the following multiple mirrors are used for multiple reflection ?

The ray of light, coming towards the mirror, is called the _______________________ .

Which of the following is a parallel beam of light ?

Which of the following are correct :

(a) When the group of rays are parallel to each other such beam of light is called a parallel beam of light.

(b) When the group of rays are not parallel to each other but are converging at a point such beam of light is called a convergent beam of light.

Which of the following are correct :

(a) Clean water is opaque object.

(b) Smoked glass is an translucent object.

(c) Wood is a opaque object.

Periscope is the instrument which works on the principle of _______________________.

Which of the following are correct :

(a) Materials that allow light to pass through without any significant scattering or absorption are called transparent materials.

(b) Materials that allow light to pass through without any significant scattering or absorption are called translucent materials.

(c) Materials that allow light to pass through them, but scatter or diffuse the light as it passes through them  are called translucent materials.