Important Questions Test: Light - Class 8 MCQ

An image which can be obtained on a screen is called a real image.

Images are of two types: real images and virtual images. Real images are formed on a screen, whereas virtual images cannot be formed on the screen.

When light rays pass from air into water, they slow down due to the change in the medium's optical density. This change in speed causes the light rays to bend towards the normal (the line perpendicular to the surface of the water) as they enter the denser medium, in a process known as refraction.

B is the correct option. It si false,actually the Kaleidoscope is based on the principle of multiple reflection. according to this the light ray get reflected by these multiple mirror. when a light ray falls on one mirror , then it get reflected to the another one.

Photoreceptors in the retina are classified into two groups, named after their physical morphologies. Rod cells are highly sensitive to light and function in nightvision, whereas cone cells are capable of detecting a wide spectrum of light photons and are responsible for colour vision.

Plane mirrors are the only type of mirror for which a real object always produces an image that is virtual, errect and of the same size as the object.