AIPMT 2009 | Dual Nature of Radiation and Matter Question 54 | Physics

AIPMT 2009

MCQ (Single Correct Answer)

-1

Monochromatic light of wavelength 667 nm is produced by a helium neon laser. The power emitted is 9 mW. The number of photons arriving per sec. on the average at a target irradiated by this beam is

3 $$ \times $$ 10¹⁶

$$9 \times {10^{15}}$$

$$3 \times {10^{19}}$$

$$9 \times {10^{17}}$$

AIPMT 2009

MCQ (Single Correct Answer)

-1

The number of photo electrons emitted for light of a frequency $$\upsilon $$ (higher than the threshold frequency $${\upsilon _0}$$) is proportional to

threshold frequency $$\left( {{\upsilon _0}} \right)$$

intensity of light

frequency of light $$\left( {{\upsilon _0}} \right)$$

$$\upsilon - {\upsilon _0}$$

AIPMT 2008

MCQ (Single Correct Answer)

-1

In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of

collisions between the charged particles emitted from the cathode and the atoms of the gas

collision between different electrons of the atoms of the gas

excitation of electrons in the atoms

collision between the atoms of the gas

AIPMT 2008

MCQ (Single Correct Answer)

-1

A particle of mass 1 mg has the same wavelength as an electron moving with a velocity of 3 $$ \times $$ 10⁶ m s^$$-$$1. The velocity of the particle is

3 $$ \times $$ 10^$$-$$31 ms^$$-$$1

$$2.7 \times {10^{ - 21}}\,m{s^{ - 1}}$$

2.7 $$ \times $$ 10^$$-$$18 ms^$$-$$1

9 $$ \times $$ 10^$$-$$2 ms^$$-$$1

PREVIOUS NEXT

NEET Subjects

Biology

Botany

Zoology

Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution