Chapter 10 – Light -Reflection and Refraction

Assertion: Cannot see the distant object clearly.
Reason: The far point of an eye suffering j, from myopia is less than infinity.

When the object is placed between f and 2f of a convex lens, the image formed is

A ray of light is travelling from a rarer medium to a denser medium. While entering the denser medium at the point of incidence, it

The image formed by a convex lens can be

If an incident ray passes through the focus, the reflected ray will

A full length image of a distant tall building can definitely be seen by using

The refractive index of water is 1.33. The speed of light in water will be

Where should an object be placed in front of convex lens to get a real image of the size of the object?

An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is

A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by

As light travels from a rarer to a denser medium it will have

The nature of image formed by a convex mirror when the object distance from the mirror is less than the distance between pole and focal point (F) of the mirror would be:

You are given three media A, B and C of refractive index 1.33, 1.65 and 1.46. The medium in which the light will travel fastest is

When object moves closer to convex lens, the image formed by it shift

A magnified real image is formed by a convex lens when the object is at

If a man’s face is 25 cm in front of concave shaving mirror producing erect image 1.5 times the size of face, focal length of the mirror would be

Where should an object be placed in front of a convex lens to get real image of the size of the object?

A divergent lens will produce

In torches, search lights and head lights of vehicles the bulb is placed

For a real object, which of the following can produce a real image?

An object is placed at a distance of 0.25 m in front of a plane mirror. The distance between the object and image will be

The distance between the object and image will be

Assertion: Pupil is black in colour.
Reason: Pupil is black in colour as no light is reflected in it.

Assertion: The rainbow is a man made spectrum of sunlight in the sky.
Reason: The rainbow is formed in the sky when the sun is shining and it is raining at the same time.(a) Both A and R are true and R is the correct explanation of A.

Which mirror can produce a virtual, erect and magnified image of an object?

Image formed by reflection from a plane mirror is

Focal length of a concave mirror is

When light falls on a smooth polished surface, most of it

Which of the following statements is/are true?

The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?