Question 1 :
Which of the following quantities changes during the process of scattering?
Question 4 :
The split of white light into its constituent colours, by a triangular prism, is known as:
Question 6 :
The path of beam of light becomes _____ in a colloidal solution.
Question 7 :
Suppose the vitreous humour of the eye dries off. Then what will be its effect on our eyes?
Question 8 :
When a white light ray falls on a prism, the ray at its first surface suffers:<br>
Question 10 :
State whether true or false :Myopia is caused due to the high converging power of the eye lens.
Question 12 :
Assertion: Bluish colour predominates in a clear sky, since blue has a shorter wavelength and is scattered strongly.
Reason: Blue has the shortest wavelength among all colours.
Question 13 :
Assertion: The setting sun appears to be red.
Reason: Scattering of light is directly proportional to the wavelength.
Question 14 :
What characteristic property of light is responsible for the blue colour of the sky?<br>
Question 15 :
Assertion: A piece of red glass is heated till it glows in dark. The colour of glowing glass would be orange.
Reason: Red and orange is complementary colours.
Question 20 :
Assertion: The setting sun appears to be red. <br>Reason: Scattering of light is directly proportional to the wavelength.
Question 21 :
Two point white dots are 1 mm apart on a black paper. They are viewed by eye of diameter $3\ mm $.<br/>Approximately, what is the maximum distance at which these dots can be resolved by the eye?<br/>[ take wavelength of light >500nm]
Question 23 :
A person is wearing spectacles with concave lenses for correcting vision. While not using the glasses, the image of a distant object in his case will be formed<br>
Question 24 :
One of the following is not an example of incomplete sex-linkage