Physics-
General
Easy
Question
A beam of white light is incident on a combinations of prisms with equal angles. In the out going beam the rainbow colours are observed as shown. Then
- the obtained colour pattern is not possible
The correct answer is:
Related Questions to study
physics-
Three thin prisms are combined as shown in figure. The refractive indices of the crown glass for red & violet rays are 
and 
respectively & those for the flint glass are 
respectively. The ratio 
for which there is no net angular dispersion
Three thin prisms are combined as shown in figure. The refractive indices of the crown glass for red & violet rays are and respectively & those for the flint glass are respectively. The ratio for which there is no net angular dispersion
physics-General
physics-
A point-like object of mass 2.0 kg moves along the x-axis with a velocity of + 4.0 m/s. A net horizontal force acting along the x-axis is applied to the object with the force-time profile shown. What is the total work that was done by the force?
A point-like object of mass 2.0 kg moves along the x-axis with a velocity of + 4.0 m/s. A net horizontal force acting along the x-axis is applied to the object with the force-time profile shown. What is the total work that was done by the force?
physics-General
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In the following problem, the word “weight” refers to the force a scale registers. If the Earth were to stop rotating, without changing shape
In the following problem, the word “weight” refers to the force a scale registers. If the Earth were to stop rotating, without changing shape
physics-General
physics-
A mass on the end of a spring oscillates with the displacement versus time graph shown to the right. Which of the following statements about its motion is CORRECT?
A mass on the end of a spring oscillates with the displacement versus time graph shown to the right. Which of the following statements about its motion is CORRECT?
physics-General
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A uniform string clamped at both ends is vibrated at constant frequency f. Initially, its vibration forms a standing wave with three antinodes. The tension in the string is gradually increased until the next standing wave mode appears. What is the ratio of final and initial tensions in the string? Assume that the string maintains the same dimensions throughout the tightening.
A uniform string clamped at both ends is vibrated at constant frequency f. Initially, its vibration forms a standing wave with three antinodes. The tension in the string is gradually increased until the next standing wave mode appears. What is the ratio of final and initial tensions in the string? Assume that the string maintains the same dimensions throughout the tightening.
physics-General
physics-
Consider the cyclic process ABCA shown in figure, performed on a sample of 1 mole of an ideal gas. A total of 1000 J of heat is withdrawn from the sample in the process, the work done on the gas during part BC is 1830 J, the value of Tb is (R = 8.3 J/K-mole)
Consider the cyclic process ABCA shown in figure, performed on a sample of 1 mole of an ideal gas. A total of 1000 J of heat is withdrawn from the sample in the process, the work done on the gas during part BC is 1830 J, the value of Tb is (R = 8.3 J/K-mole)
physics-General
physics-
A rubber ball bounces on the ground as shown. After each bounce, the ball reaches one-half the highest of the bounce before it. If the time the ball was in the air between the first and second bounce was 1 second, what would be the time between the second and third bounce?
A rubber ball bounces on the ground as shown. After each bounce, the ball reaches one-half the highest of the bounce before it. If the time the ball was in the air between the first and second bounce was 1 second, what would be the time between the second and third bounce?
physics-General
physics-
A monatomic ideal gas is used as the working substance for the Carnot cycle shown in the figure. Processes AB and CD are isothermal, while processes BC and DA are adiabatic. During process AB, 400 J of work is done by the gas on the surroundings. How much heat is expelled by the gas during process CD?
A monatomic ideal gas is used as the working substance for the Carnot cycle shown in the figure. Processes AB and CD are isothermal, while processes BC and DA are adiabatic. During process AB, 400 J of work is done by the gas on the surroundings. How much heat is expelled by the gas during process CD?
physics-General
physics-
A opaque card is held over the lower half of a converging lens as shown in figure. Which picture is best shows the image that appears on the screen
A opaque card is held over the lower half of a converging lens as shown in figure. Which picture is best shows the image that appears on the screen
physics-General
physics-
A uniform rod of mass m suspended by two identical threads l in length (see figure) was turned through a small angle about the vertical axis passing through its middle point C. The threads deviated in the process through a small angle a Then the rod was released to start performing small oscillations. The rod's oscillation energy is
A uniform rod of mass m suspended by two identical threads l in length (see figure) was turned through a small angle about the vertical axis passing through its middle point C. The threads deviated in the process through a small angle a Then the rod was released to start performing small oscillations. The rod's oscillation energy is
physics-General
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The diagram shows an equiconvex lens. What should be the condition on the refractive indices so that the lens become diverging?
The diagram shows an equiconvex lens. What should be the condition on the refractive indices so that the lens become diverging?
physics-General
physics-
Figure shows graph of change in temperature 
vs heat supplied Q for different processes performed on a gas. Mark the appropriate statement(s).
Figure shows graph of change in temperature vs heat supplied Q for different processes performed on a gas. Mark the appropriate statement(s).
physics-General
physics-
The block is now divided into two blocks (with M1 + M2 = M) and the apparatus is rearranged as shown in figure b. If the speeds of transverse waves in the two strings are equal the values of M1 and M2 will be respectively
The block is now divided into two blocks (with M1 + M2 = M) and the apparatus is rearranged as shown in figure b. If the speeds of transverse waves in the two strings are equal the values of M1 and M2 will be respectively
physics-General
physics-
The potential energy, U of three simple harmonic oscillations varies with displacement 'X' from the mean position as shown in the figure. These oscillators have the same mass but different amplitudes A1, A2 and A3. Their characteristic frequencies n1, n2 and n3 are related to each other as
The potential energy, U of three simple harmonic oscillations varies with displacement 'X' from the mean position as shown in the figure. These oscillators have the same mass but different amplitudes A1, A2 and A3. Their characteristic frequencies n1, n2 and n3 are related to each other as
physics-General
physics-
An insect starts moving up in a liquid from point O of variable refractive index 
where y is depth of liquid from the surface. If u is the speed of insect, its apparent speed to the observer E is
An insect starts moving up in a liquid from point O of variable refractive index where y is depth of liquid from the surface. If u is the speed of insect, its apparent speed to the observer E is
physics-General
