Compton effect is associated with
| (a) α - rays | (b) β - rays | (c) X-rays | (d) Positive rays |
Compton effect is associated with
| (a) α - rays | (b) β - rays | (c) X-rays | (d) Positive rays |
(c) X-rays
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A bulb of 100 watt is hanging at a height of one meter above the centre of a circular table of diameter 4 m. If the intensity at a point on its rim is
, then the intensity at the centre of the table will be
|
(a) |
(b) 2 |
(c) 2 |
(d) 5 |
A direct X-ray photograph of the intestines is not generally taken by the radiologists because
|
(a) Intestines would burst on exposure to X-rays |
|
(b) The X-rays would not pass through the intestines |
|
(c) The X-rays will pass through the intestines without causing a good shadow for any useful diagnosis |
|
(d) A very small exposure of X-rays causes cancer in the intestines |
The half-life of a radioactive substance is 3.6 days. How much of 20 mg of this radioactive substance will remain after 36 days
|
(a) 0.0019 mg |
(b) 1.019 mg |
(c) 1.109 mg |
(d) 0.019 mg |