Which of the following is correct? (A) The size of image on the retina is roughly proportional to the angle subtended by the object on the eye. This angle is known as visual angle. The optical instruments are used to increase the visual angle (B) In normal adjustment, eye is least strained and final image is formed at infinity (c) The magnifying power is written with a unit X (D) All options are correct
On seeing with unaided eye, the visual angle of moon at the eye is 0.6^(@) . The focal lengths of the objective and the eyepiece of a telescope are respectively 200 cm and 5 cm. What will the visual angle on seeing through the telescope?
Presbyopia is a visual defect caused by
Which of the following structure receives and integrates with visual, tactile and auditory inputs ?
Iodopsin is visual pigment of…………….. while rhodopsin is visual pigment of …………….. .
