Question 2 :
For which of the following colour, the magnifying power of a microscope will be maximum

Question 3 :
The mean distance of sun from the earth is {tex}1.5\times {{10}^{8}}Km{/tex} (nearly). The time taken by the light to reach earth from the sun is[Pb. PET 2003]

Question 4 :
Time taken by the sunlight to pass through a window of thickness 4 mm whose refractive index is 1.5 is [CBSE PMT 1993]

Question 5 :
In a double slit interference experiment, the distance between the slits is 0.05 cm and screen is 2 m away from the slits. The wavelength of light is <img style='object-fit:contain' width=67 height=20 src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea2970201a30b5955496f19"> cm. The distance between successive fringes is

Question 8 :
A Youngs double slit experiment uses a monochromatic source. The shape of the interference fringes formed on a screen is

Question 9 :
A ray of light incidents on a plane mirror at an angle of {tex}30{}^\circ .{/tex} The deviation produced in the ray is

Question 10 :
The maximum number of possible interference maxima for slit- separation equal to twice the wavelength in Young's double-slit experiment is

Question 11 :
The dispersive power of the material of lens of focal length 20 cm is 0.08. The longitudinal chromatic aberration of the lens is[EAMCET 2005]

Question 12 :
A light bulb is placed between two plane mirrors inclined at an angle of {tex}60{}^\circ .{/tex} The number of images formed are[NCERT 1980; CPMT 1996, 97; SCRA 1994; AIIMS 1997; RPMT 1999; AIEEE 2002;Orissa JEE 2003; MP PMT 2004; MP PET 2004]

Question 13 :
Light takes 8 min 20 sec to reach from sun on the earth. If the whole atmosphere is filled with water, the light will take the time({tex}_{a}{{\mu }_{w}}=4/3{/tex})

Question 15 :
An object is placed at a distance of 20 cm from a convex lens of focal length 10 cm. The image is formed on the other side of the lens at a distance[CPMT 1971; RPET 2003]

Question 16 :
Which of the following phenomena can explain quantum nature of light

Question 17 :
If tube length of astronomical telescope is 105 cm and magnifying power is 20 for normal setting, calculate the focal length of objective[AFMC 1994]

Question 18 :
The focal lengths of the objective and eye-piece of a telescope are respectively 100 cm and 2 cm. The moon subtends an angle of {tex}{{0.5}^{o}}\,{/tex}at the eye. If it is looked through the telescope, the angle subtended by the moon's image will be[MP PMT 2000; DCE 2003]

Question 21 :
How will the diffraction pattern of single slit change when yellow light us replaced by blue light? The fringe will be

Question 22 :
In case of linearly polarized light, the magnitude of the electric field vector

Question 23 :
A point source of light moves in a straight line parallel to a plane table. Consider a small portion of the table directly below the line of movement of the source. The illuminance at this portion varies with its distance r from the source as

Question 24 :
Which one of the following phenomena is not explained by Huygens construction of wavefront

Question 27 :
The angular magnification of a simple microscope can be increased by increasing[Orissa JEE 2002]

Question 29 :
While using an electric bulb, the reflection for street lighting should be from

Question 30 :
A new system of units is evolved in which the values of <img style='object-fit:contain' width=15 height=20 src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea296784304d056cccd9d47"> and <img style='object-fit:contain' width=14 height=20 src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea2967801a30b5955496e6a"> are 2 and 8 respectively. Then the speed of light in this system will be

Question 32 :
The focal length of an objective of a telescope is 3 metre and diameter 15 cm. Assuming for a normal eye, the diameter of the pupil is 3 mm for its complete use, the focal length of eye piece must be[MP PET 1989]

Question 33 :
If in compound microscope m1 and m2 be the linear magnification of the objective lens and eye lens respectively, then magnifying power of the compound microscope will be[CPMT 1985; KCET 1994]

Question 34 :
The rectilinear propagation of light in a medium is due to its

Question 35 :
Two identical light sources <img style='object-fit:contain' width=14 height=20 src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea296c54304d056cccd9db4"> and <img style='object-fit:contain' width=14 height=20 src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea296ce8ab67a08eba55b94"> emit light of same wavelength <img style='object-fit:contain' width=8 height=20 src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea2962c8ab67a08eba55a14"> . These light rays will exhibit interference if

Question 37 :
As a result of interference of two coherent sources of light, energy is

Question 38 :
Which of the following statements is true, when spherical waves fall on a plane refracting surface, separating two media

Question 39 :
Frequency of wave is <img style='object-fit:contain' width=72 height=20 src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea296b701a30b5955496eb3"> . The wave is

Question 41 :
A convex mirror is used to form the image of an object. Which of the following statements is wrong ?

Question 42 :
For observing a cricket match, a binocular is preferred to a terrestrial telescope because

Question 43 :
Electromagnetic radiation of frequency n, wavelength {tex}\lambda {/tex}, travelling with velocity v in air, enters a glass slab of refractive index {tex}\mu {/tex}. The frequency, wavelength and velocity of light in the glass slab will be respectively [CBSE PMT 1997]

Question 44 :
Radio waves diffract around building although light waves do not. The reason is that radio waves

Question 45 :
Monochromatic light is refracted from air into the glass of refractive index {tex}\mu {/tex}. The ratio of the wavelength of incident and refracted waves is [JIPMER 2000; MP PMT 1996, 2003]

Question 48 :
The wavelength of sodium light in air is {tex}5890\,{AA}{/tex}. The velocity of light in air is {tex}3\times {{10}^{8}}m{{s}^{-1}}.{/tex} The wavelength of light in a glass of refractive index 1.6 would be close to[DCE 2003]

Question 49 :
The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 Å is of the order [CBSE PMT 2005]

Question 50 :
Which if the following phenomena is not common to sound and light waves?