Why do individuals with hypermetropia have difficulty seeing nearby objects clearly?

• A) Eyes focus light behind the retina
• B) Eyes can't detect light wavelengths
• C) Eyes have a perfect focal length
• D) Eyes focus light in front of the retina

The least distance of distinct vision for normal eye:

• A) 5 cm
• B) 10 cm
• C) 50 cm
• D) 25 cm

Metal pipes, used to carry water, sometimes burst in the winter because:

• A) Metal becomes brittle when cold
• B) Metal contractst more han water
• C) Water expands when it freezes
• D) Outside of the pipe contracts more than the inside

The speed of light in a vacuum is approximately:

• A) 3,000 km/s
• B) 300 km/s
• C) 300,000 km/s
• D) 30,000 km/s

How is the mechanical equivalent of heat quantified in terms of calories and joules?

• A) 1 cal = 1 Joule
• B) 1 kcal = 4.186 Joule
• C) 1 cal = 4.186 Joule
• D) 1 kcal = 1 Joule

An erect object is located between a concave mirror and its focal point. Its image is:

• A) Real, inverted, and larger than the object
• B) Real, erect, and larger than the object
• C) Virtual, erect, and larger than the object
• D) Virtual, inverted, and larger than the object

How does a refrigerator differ from a heat engine in terms of its operation?

• A) A refrigerator is always 100% efficient.
• B) A refrigerator is a heat engine working in reverse.
• C) A refrigerator operates at a single temperature.
• D) A refrigerator only absorbs heat.

The "strength" of a lens is measured in _________.

• A) Lense meter
• B) Diopters
• C) Meters
• D) Provatans

In order that a single process is both isothermal and isobaric:

• A) A change of phase is essential
• B) One must use a solid
• C) One may use any real gas such as N2
• D) One must use an ideal gas

For an electron, the rest mass energy is:

• A) 0.711 MeV
• B) 0.511 MeV
• C) 0.411 MeV
• D) 0.611 MeV

In an adiabatic process:

• A) The absorbed as heat equals the change in internal energy
• B) The energy absorbed as heat equals the work done by the system on its environment
• C) The work done by the environment on the system equals the change in internal energy
• D) The energy absorbed as heat equals the work done by the environment on the system

For a heat engine operating between a high temperature TH and a low temperature TC, the efficiency ɛ is given by:

• A) $ɛ = {T_H+T_C \over T_H}$
• B) $ɛ = 1+{T_C \over T_H}$
• C) $ɛ = {T_H-T_C \over T_C}$
• D) $ɛ = 1-{T_C \over T_H}$

The ratio of the size of image to the size of object:

• A) Angular magnification
• B) Resolving power
• C) Critical angle
• D) Linear magnification

The phenomena in which a material emits different colours after being exposed to a specific light color is:

• A) Fluorescence
• B) Reflection
• C) Phosphorescence
• D) Refraction

No lens is perfect because___________________.

• A) They are not cleaned with accuracy
• B) They are not perfectly spherical
• C) It is nearly impossible to polish them
• D) They suffer from aberration

Antiparticle of electron is:

• A) Neutron
• B) Photon
• C) Proton
• D) Positron

The points of constructive interference of the light are:

• A) Always bright
• B) May be bright or dark
• C) Neither bright nor dark
• D) Always dark

The formula ${Q\over t} =kA {ΔT \over L}$ allows us to determine:

• A) Amount of heat transferred over time.
• B) Thermal resistance of the material.
• C) Change in temperature due to heat transfer.
• D) Heat capacity of the material.

If the temperature in Celsius is 20°C, what would it be in Fahrenheit?

• A) 56°F
• B) 44°F
• C) 36°F
• D) 68°F

Which of the following electromagnetic radiations has photons with the greatest energy?

• A) blue light
• B) x rays
• C) yellow light
• D) radio waves