When you stand in front of a plane mirror, your image is:

• A) virtual, erect, and smaller than you
• B) real, inverted, and the same size as you
• C) real, erect, and smaller than you
• D) virtual, erect, and the same size as you

Thin films formed due to detergents (soap / shampoo) are due to ______.

• A) diffraction
• B) reflection
• C) interference
• D) absorption

A particle with zero mass and energy E carries momentum:

• A) Ec
• B) E/c
• C) vEc
• D) Ec2

The resolving power of a telescope can be increased by:

• A) inserting a correction lens between objective and eyepiece
• B) increasing the objective focal length and decreasing the eyepiece focal length
• C) increasing the lens diameters
• D) decreasing the lens diameters

Hotness or coldness of an object is represented in terms of:

• A) Chemical energy
• B) Electrical energy
• C) Temperature
• D) Heat

A light entering into glass prism from air does not give change in its:

• A) Wavelength
• B) Direction
• C) Velocity
• D) Frequency

Following are the ways by which light can interact with matter, EXCEPT:

• A) Interference
• B) Emission
• C) Absorption
• D) Transmission

What must be supplied to melt a solid without a temperature change?

• A) Kinetic energy
• B) Pressure
• C) Specific heat
• D) Latent heat of fusion

In special relativity, the factor γ is used to calculate:

• A) Length contraction
• B) Neither time dilation nor length contraction
• C) Both time dilation and length contraction
• D) Time dilation

Which of the following device work on the principle of interference of light:

• A) Compound microscope
• B) Telescope
• C) Young’s double slit experiment
• D) Newton rings apparatus

Which of the following is true of all virtual images?

• A) They are smaller than the objects
• B) They can be seen but not photographed
• C) They are larger than the objects
• D) None of these

Which temperature scale is considered most suited for scientific purposes?

• A) Kelvin.
• B) Fahrenheit.
• C) Centigrade.
• D) Absolute zero.

The relation for converting the temperature scale from Celsius to Fahrenheit is:

• A) $T_F = {9\over5} × T_C +32$
• B) $T_C = {5\over9} × (T_F-32)$
• C) $T_F = T_C − 273.15$
• D) $T_C = T_F + 273.15$

If you have a convex spherical mirror with silvering on its outside surface, how will the radius of curvature be defined?

• A) Zero
• B) Undefined
• C) Negative
• D) Positive

All-natural process proceeds towards a state of:

• A) Remains constant
• B) Increase in entropy
• C) Decrease in entropy
• D) None of these

In the constant volume gas thermometer, what is the role of the tube on the right side?

• A) It measures the pressure.
• B) It changes the gas composition.
• C) It keeps the reference level fixed.
• D) It determines the gas volume.

Fiber optics works on the principle of _____________.

• A) Fermat's principle
• B) Snell's law
• C) Young's principle
• D) Total internal reflection

Total internal reflection is possible when a light ray travels from:

• A) Air to glass
• B) Air to water
• C) Glass to water
• D) Water to glass

A virtual image is one:

• A) from which light rays diverge as they pass through
• B) toward which light rays converge but do not pass through
• C) from which light rays diverge but do not pass through
• D) toward which light rays converge and pass through

When an iron rod is heated, the colors at different temperatures are noted. Which of the following colors shows that the iron rod is at the lowest temperature?

• A) Orrange
• B) Blue
• C) Red
• D) White