ray optics

Consider an extended object immersed in water contained in a plane trough. When seen from close to the edge of the trough the object looks distorted. Which of the following is not correct.

• The apparent depth of the points close to the edge are nearer the surface of the water compared to the points away from the edge.

• The angle subtended by the image of the object at the eye is smaller than the actual angle subtended by the object in air.

• Some of the points of the object far away from the edge may not be visible because of total internal reflection.

• Water in a trough acts as a lens and magnifies the object.

Critical angle and refractive index are:

• Directly related

• Equal

• Inversely related

• None of these

A point source of light is placed in front of a plane mirror.

• All the reflected rays meet at a point when produced backward.

• Only the reflected rays close to the normal meet at a point when produced backward

• Only the reflected rays making a small angle with the mirror, meet at a point when produced backward

• Light of different colours make different images

Mark the correct options:

• If the incident rays are converging, we have a real object.

• If the final rays are converging, we have a real image.

• The image of a virtual object is called a virtual image.

• If the image is virtual, the corresponding object is called a virtual object.

Mirage is a phenomenon due to:

• Refraction of light

• Reflection of light

• Total internal reflection of light

• Diffraction of light

What type of image does this lens form?

• Virtual image
• Real Image
• No Image

Which figure represents the path light takes through a converging lens?

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A hollow convex lens of glass will behave like

• convex lens

• concave lens

• glass plate

• mirror

A real image is formed by a a convex lens, then it is put in contact with a concave lens and again a real image is formed. This image is : ______________

• shift towards the lens system

• shift away from the lens system

• remain in its original position

• shift to infinity

The speed of light in an isotropic medium depends on,

• its intensity

• its wavelength

• the nature of propagation

• the motion of the source w.r.t medium