Light Test - 8...

Cylindrical lenses are used to cure

A transparent spherical structure that refracts light into the eye is called

The opening in the eye that regulates the amount of light entering the eye is called

The principle of persistence of vision forms the basis of working of

Figure (A), (B) and (C) show ________, ________ and ________ respectively.

Which of the following is the relation between focal length (f) and radius of curvature (R)?

Which of the following diagrams is correct?

The least distance of distinct vision for a normal vision is about

The relative refractive index of medium B with respect to medium A is . If the speed of light in the medium B is 2 × 10⁸, the speed of light in the medium A is

The absolute refractive index is the

The velocity of light in two different mediums of refractive indices n₁ and n₂ is v₁ and v₂, respectively. Which of the following relations will be true?

If the velocity of light in vacuum is 3 × 10⁸ m/s, the velocity of light in diamond (refractive index of diamond is 2.417) is

If a ray of light is incident on a plane mirror at an angle of 20^o with the mirror, what will be the angle of reflection?

What is the focal length of a plane mirror?

If the magnification has a negative sign, the image is ________ and ________.

When an object is placed between two parallel mirrors, the number of images formed will be

In old age, people generally have to wear spectacles for reading and writing because

Which of the following options is the main difference between an eye and a camera?

A dark muscular assembly which controls the size of the opening that regulates the amount of light entering the eye is called

The screen of eye is called