Mirage is an example of
1). refraction of light only
2). total internal reflection of light only
3). refraction and total internal reflection of light
4). dispersion of light only
1. An optically plane surface reflects a beam of light
2. A real gas can act as an ideal gas in
4. The sudden fall of atmospheric pressure indicates
5. The wavelength at which the peak of intensity of blackbody radiation occurs
6. The value of coefficient of restitution in perfectly elastic collision is
8. Two vectors are said to be equal if