Question:
The image formed by a plane mirror is
Real and same size as the object.
Virtual, same size as the object.
Real and magnified.
None of these.
Question:
36 The limit of resolution of the eye is one minute at a distance x from the eye. Two persons stand with a lateral separation of 3cms. To see the two persons just resolved by the naked eye. X should be about
Question:
In the displacement method of measuring the focal length of a convex lens, the length of the images in the two positions of the lens between the object and the screen is respectively. The length of the object is
Question:
The refracting angle of a prism is a and the refractive index of the material of the prism, the angle of minimum deviation is
Question:
A ray of light travels from vacuum into a medium of refractive index n. The angle of incidence is found to be twice the angle of refraction. The angle of incidence is
Question:
An object placed at distance ‘a’ from the focus of a convex lens forms its real image at a distance ‘b’ from the focus. The focal length of the mirror is