The region of the vertebrate eve, where the optic nerve passes out of the retina, is called the (a) fovea, (b) iris,(c) blind spot, (d) optic chaisma.

The region of the vertebrate eye, where the optic nerve passes out of the retina, is called the (a) fovea (b) iris (c ) blind spot (d) optic chaisma

The region of the vertebrate eye, where the optics nerve passes out of the retina and photoreceptor cells are not present in that region is called

In the blind spot where the optic nerves leaves the eye

The central opening of iris is called as (a) Cornea (b) Lens (c) Pupil (d) Fovea centralis

Assertion: The optic nerve leaves the eye at the point called blind spot Reason: Only cones are densely packed at the blind spot, hence is the name.

In the chemistry of vision in mammals, the photosensitive substance is called or The visual pigment in rods of retina of vertebrate eye which is responsible for detection of light is or It is present in rods and useful in night vision (a) Rhodopsin (b) Vitamin C (c) Melanin (d) Vitamin K

Each question in this section has four choices A,B,C,and D out of which only one is correct. Mark your choices as follows. Statement-I: The error made in calculating the area of the triangle ABC where the sides a and b are measured accurately as 25cm and 16 cm respectively. while the angle C is measured as 60^(@) with an error of ((1)/(2))^(@) . Estimated error of the area of the triangle is (55)/(63) cm ^(2) . Statement-II : Area of triangle ABC = (1)/(2) ab sin C.

The initial number of radioactive atoms in a radioactive sample is N_0 . If after time t the number of becomes N, then N=N_0e^(-lambdat) , where lambda is known as the decay constant of the element. The time in which the number of radioactive atoms becomes half of its initial number is called the half-life (T) of the element. The time in which the number of atoms falls to 1/e times of its initial number is the mean life (tau) of the element. The product lambdaN is the activity (A) of the radioactive sample when the number of atoms is N. The SI unit of activity is bequerel (Bq)' where 1 Bq= 1 decay. s^(-1) . After how many days the activity of Iodine-131 will be 1/16 th of its initial value. [The half-life of Iodine-131 is 8 d.] (A) 24 d (B) 32 d (C) 40 d (D) 48 d

The initial number of radioactive atoms in a radioactive sample is N_0 . If after time t the number of becomes N, then N=N_0e^(-lambdat) , where lambda is known as the decay constant of the element. The time in which the number of radioactive atoms becomes half of its initial number is called the half-life (T) of the element. The time in which the number of atoms falls to 1/e times of its initial number is the mean life (tau) of the element. The product lambdaN is the activity (A) of the radioactive sample when the number of atoms is N. The SI unit of activity is bequerel (Bq)' where 1 Bq = 1 decay. s^(-1) . The half-life of Iodine-131 is 8 d. What is the activity (in Bq) of 1 g of Iodine? (A) 2.3xx10^15 (B) 4.6xx10^15 (C) 6.9xx10^15 (D) 9.2xx10^15

The initial number of radioactive atoms in a radioactive sample is N_0 . If after time t the number of becomes N, then N=N_0e^(-lambdat) , where lambda is known as the decay constant of the element. The time in which the number of radioactive atoms becomes half of its initial number is called the half-life (T) of the element. The time in which the number of atoms falls to 1/e times of its initial number is the mean life (tau) of the element. The product lambdaN is the activity (A) of the radioactive sample when the number of atoms is N. The SI unit of activity is bequerel (Bq)' where 1 Bq = 1 decay. s^(-1) , The half-life of Iodine-131 is 8d. Its decay constant (in SI) is - (A) 10^(-6) (B) 1.45xx10^(-6) (C) 2xx10^(-6) (D) 2.9xx10^(-6)