Which one of the following is incorrect statement about a photon?
Photon‘s rest mass is zero
Photon?s momentum is hv/c
Photon?s energy is hv
Photons exert no pressure
The angle of prism is 300. The rays incident at 600 on one refracting surface. surface a deviation of 300. What is the angle of emergence?
00
150
300
450
A spherical air bubble in water behaves as
convex lens
concave lens
concave mirror
plane mirror
A thin convergent glass lens (μ=1.5) has a power of +5.0D. When this lens is immersed in a liquid of refractive index μ1it acts as a divergence lens of focal length 100cm. The value of μ1 should be
3/2
4/3
5/3
2
A spherical mirror produces lateral magnification M what is the longitudinal magnification produced by it?
M2
M
M1/2
M3/2
Which of the following does not change,when a photon enters glass from air?
Momentum
Velocity
Wavelength
Energy
Two plano convex lenses of radius of curvature R and refractive index ?=1.5 will have equivalent focal length equal to R, when they are placed.
at distance R/4
at distance R/2
at distance
in contact with each other.
If x and y be the distance of the object and image formed by a concave mirror from its focus and f be the focal length,then:
xy = f
xy = f2
x/y = f
x/y = f2
A convex lens of focal length 25cm is placed at a distance x from a concave lens of focal lenght 7cm. When a parallel beam is incident on the convex lens it emerges as a parallel beam out of the concave lens. What is the value of x?
20cm
18cm
16cm
14cm
A glass slab of thickness 4cm contains the same numbers of waves as 5cm of water when both are traced by the same monochromatic ray of light. The refrative index of water is 4/3. What is that for glass?
5/4
16/15
